Why is your paint crazing?
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- čas přidán 15. 06. 2024
- Is your paint crazing or cracking? There are a few different reasons that this can happen. In this video, I talk about those reasons, and how to avoid this problem.
Hey guys! I’m Brad, and I make how-to videos, project vlogs, and more. I do custom painting projects, guitar painting, airbrushing, spray can painting, wood working, and a variety of other finishing work. Please subscribe and check out my channel for more!
Have you had problems with your paint crazing, shrivelling, wrinkling, etc.? In this video we discuss some of the reasons why that may be happening, and a few things that you can do to help prevent it.
Don't forget to ask your questions in the comment section.
Thanks for watching.
To get in touch with me with your questions, photos, etc. use the links below!
/ bradangovepainting
/ brad_angove
/ brad.angove - Jak na to + styl
I put a primer and let it dry for two days.... Then put a glossy coat on and instantly it started cracking... Like within 1 minute.... So weird.
I've 'restored' an old toolbox from 1931 and the crazed paint (imo) looks quite neat on it. Gives it that used industrial look from that time.
Good info thanks for your time.
Thanx Brad!!! You are now my go to guy for painting issues!! U ROCK!
Thanks Kathy. Glad I could help.
Thank you. I appreciate your judgement
My judgement?
Thank You Brad. This video was very helpful to me. I do acrylic pouring, and love to experiment. You have answered many questions that I had. Excellent!!!
Glad I could help. Those thick pour on finishes are prone to this sort of issue.
Thank you man, gave me some insight to problems I’ve been having.
Glad I could help.
Always helpful information for us weekend project warriors. I would be interested in seeing the experiment.
You answered my pin hole question and whatever else you said. Perfect. New subscriber!
Thanks. Welcome aboard.
Thank you! I didn't wait long enough for my recoat time before applying my top coat (it had been about 18 hrs). This explained my issue.
Thanks for the great info in this video. Couldn't work out what I was doing wrong and your advice about mixing different types of paint explained it all. No enamel and lacquer combinations
+Brenco Electric I'm glad to hear you found it useful.
Super informative. Thank you
i catch myself watching your videos sometimes and i forget to drop a like and i legit get upset with myself cuz i really take the info you give seriously. I would just imagine it must feel quite good to know that all the way out in South Africa someone is using your advice. Very happy with the content on this channel
Thank you Roman. I’m glad your finding my videos useful.
Thanks for the information, that was helpful
This is why I sub.... you are quick and concise with your vids. I’m working on a metalcast strat body and the metalcast color didn’t jive with the metallic coat because I was impatient. It pulled together and made little clumps of metallic gunk under the translucent blue. Guess I need to be patient 🤷🏻♂️
Lighter coats to start with will hopefully help.
Super helpful! Great job!
I’m glad you found it useful.
Excellent information. I was experiencing this on one of my jobs tonight and was just baffled by it. But I think now I understand exactly what the issue was. Thank you. Very helpful 👍
Glad I could help
@@BradAngove yes, you really did. 🤗 Thank you
Yeah brother I think you're right on about all of it I am working with fiberglass resin first thing and it's August and I'm working in the heat and layering problems for me thank you
Is anybody else saying "oops" after pretty much every reason?
... yeah that’ll happen.
Great video really appreciated your great advice thank you very much God bless you
So i have an alkyd red paint, can i use it with acrylic clear coat and if so when is the best time to apply the clear coat after ive hit it with the base, after view minutes or after view days
I had a really bad experience with paint cracking while using my airless sprayer and couldn't understand why. This video helped a lot.
Glad I could help
I haven't finished it yet. I have used body filler and then sanded down but not used primer paint not sure if it is necessary. my paint work cracked because of applying too much paint.
Thank u man good explanations✌
thanks for the knowledge
Thanks for watching.
I'm working on a project that I hope will eventually turn out great, but painting the guitar body has caused me endless headaches although it has also taught me a lot because of the mistakes I've made. First of all, before I even thought about painting I did a "mock up" matching the body and neck (with the original electronics) and the tone and playability were excellent, so I knew they were a good match. I disassembled everything and started with the body which had considerable gashes, holes, and other damage. It is made of mahogany, which I soon discovered was a very pourous wood. My first mistake was to completely sand off the existing finish before filling in all the damage. This is where I realized that I should have left the original finish on. If I had done that, I wouldn't have had to spray so many coats of primer (which of course didn't work). I finally decided to use a gloss protective enamel which seemed to finally start giving me a clear coat. My next mistake was to use too much of it. I found that it wouldn't dry. I tried baking it in the oven and leaving it out all day in the summer sun for over a month and the over runs were still not dry. Out of frustration, I put it away for a couple of months while I started learning to use my paint guns. Anyhow, when I got it back out and all the paint was finally dry. I started hand sanding it with some 500 grit paper, but the over runs were so thick that I used an electric sander with 200 grit paper just to try and get a flat finish. That removed most of the "crazing", so I started hand sanding with a higher grit paper but I still can't get a lot of the "rippling" out without sanding it almost back to the bare wood. As I mentioned before, I've learned a lot about what not to do but now I have a deliema. Should I keep sanding until all the mistakes are gone and start over or try and salvage what I started? I have a friend with a shop which is heated now that the weather is cooler, so that's not a problem. I also know a guy who owns an auto body shop and I'm almost to the point of frustration that I am considering taking it there and letting him finish the whole job. I really want to do this myself but on the other hand, I want to get the paint job done so I can put the guitar together (I've had all the new electronics and other hardware for months) and start playing it. If I do decide to paint and finish it (polyurethane) myself, how do you suggest I do this. I am an advanced player with many years of experience, but I'm still a novice at painting. Any advice would be greatly appreciated.
+Mulehead now that you’ve built a finish on there, everything should be sealed up. I would sand it back flat using a sanding block, and re-finish it. This time use light coats. 3 coats of colour 15 minutes apart. Let it dry for 3 days. Sand smooth at 800 grit. Then repeat with clear coat, twice (6 coats total.
For the drying, let that happen inside. Never put drying paint in direct sunlight.
Let those final coats dry for 2 weeks, then you should be able to sand and polish. I’d give it another week or two after that before putting hardware on ideally.
On point.exactly what i needed !thank alot for this vidéo !!
Thanks Tom
I just got finished painting my guitar and i put the clear coat on when i turned away for about 5 sec I started to notice some crack and shrivel up . I had chills running up and down my back but it only happened on a certain color. I wanted to do a EVH frankenstrat look to my guitar and the only thing that was affects by this was the red everything else was fine. I probably did not dry for long enough, too bad I have to take off all the red though :(.
Just happened to me. Crazy custom paint job on a PS2 as a birthday present for my dad, did everything right and the very first layer of clear reacted and ruined the entire paintjob. Never use Rustoleum American Accents 2X Clear smh
Thanks! I was already sure to leave everything (paint and doors) at room temp over night and I was still getting pretty frustrated because my issue is manifesting in my second coat on several doors I need to get done. The first coat on both sides of every piece had zero crazing, so I’m basically ruling out contaminates. I will try a slightly lighter coat and allow even more dry time between. New subscriber today 😎
I hope that fixes the issue.
I tried so many different techniques painting and sanding my guitar. But no matter how many coats I put on or how long I let it dry or how rough or how smooth it is, as soon as I go to spray on the clear coat it cracks within seconds. Then I have to let it dry and sand it back down and start over. I’m using the same brand and type of clear coat as paint and I have no idea what I’m doing wrong.
great video ,,, helped me a lot
Glad to hear it.
Thanks for the video
This is helpful thanks, a am painting my car, and saw this on my newly finished hood... after all the cut and buff... didnt know what yhe hell happened. And when i push on the hood, i can hear it crackle... totally new experience for me
Sorry to hear that
You can guarantee it's going to happen if you spray your clear on too quickly. You spray your base coat and either spray the clear when it's touch dry (recommended time), or when it's fully dry (2-3 full days later). Short cutting the drive time to spray clear will get you cracking 100% of the time.
What kind of paint are you talking about? I’ve never heard of waiting 2-3 days but I’m mostly familiar with automotive paint. The stuff I use you’re supposed to wait 30 minutes after the last coat of base and the spray clear. If you waited 2-3 days you’d have to scuff and then spray a coat of base again and then wait 30 minutes and clear. That’s how you get a good chemical bond instead of just a mechanical bond.
Thanks for sharing..my plastic bumper just did that...I'm painting in a garage temp inside around 80s, alittle humid...I feel mine was a chemical reaction...with all the different layers I sprayed with like you said...it's disappointing
Sorry to hear that. Hopefully you can fix it.
Thanks man yah!! Having crazen goin on! ",but yea... Looks good, but thanks man good, good advice man!!👍👍👍👍👍👍💯
Thanks. This was helpful. I was thinking the issue I am having is the temperature. Could be room temperature. Could be the object is too cold. Gave me some things to think about. Thanks.
Glad I could hopefully help.
I got a new Guitar & it had crackled finish right at the Nut along side of the neck on the bass side of the neck it's a LP. What do you think caused that?
+Watchman4u It depends. How old would the guitar likely be?
Had to paint the roof around the sunroof. Yesterday it looked great. I tried fixing some fisheyes and put on another coat. From there it went south. Now I have to sand it down and start all over. But it is significantly colder today than it was 2 days ago. I think that’s where the crazing was coming from. Thanks for the info!
America First Did u sand it down to bare metal? If yes what grit u used?
POWERTECH no the piece that goes around the sunroof is actually thick plastic. So I was as gentle as I could be
All three are my problem! Thank you so much man I messed up my in-laws shelf
I hope you’re able to fix it up.
A great little tutorial! Planning my first build using auto paints and this will motivate me to NOT RUSH the various layers. With other finishes like stain, oil, wax I have also had problems by being in too much of a hurry. specifically after getting a nice look after many coats of Danish Oil type treatment (similar to TruOil) I've gone to waxing too early even though I've waited a day after the final oil application. It makes for a real problem as that wax polishing which requires a hard buffing and heating up the wax has softened the underlying layers and makes it impossible to get a a good finish. Easily recoverable though in that as the oil and the Renaissance wax I was using are petroleum based I just left the body for a day and then did a coat or two of oil and then left it a few days before waxing again. Much better! For info I still wasn't totally happy with the look so waited a few more days and then used Autoglym Resin Polish (another auto product). That's a liquid product and much easier to apply than the solid wax but probably needed the wax underneath. The result was really pleasing.
In short I totally agree that there is everything to gain by waiting as long as possible between layers (meaning different products like primer, colour, and gloss) and to a degree between coats of each layer.
+Edmund Isanski Waiting longer does tend to be the safer option. That sounds like quite the finishing project. I'm glad it turned out well.
What i find handy is clean after every coat that dry's i use a vevor spray booth & dew to lack of ventilation after 15min's between coat's put a fan on to get some air flowing & yes i've had plenty of wrinkle's
Very helpful
thanks Brad my question is Im doing a old Vw bus cheap with rattle cans of Tremclade white when is it safe and what do you recommend for a clear over it
I would think tremclad has a compatible clear coat, but I’m not sure on the timing.
Got cracking from 3 variables on my 2nd coat of clear. Heat, was like 95-100. Too heavy a second coat within 20 minutes. And might have been incompatible putting rustoleum clear over krylon fusion. Had no problems putting my krylon coats on in the temps
I painted a pickguard and back cover and it crazed over night cause it got really cold (thanks Wisconsin for being 60 degrees one day and 38 the next) thankfully it didn't happen to the guitar body and it looks cool on them. Which is great since you will not be physically touching (at least not aggressively like where you may rest your wrist on your picking arm) so it can keep the craised look
Did you use adhesion promoter?
How can you find out which type/sort paint is put on when you decide to repaint an existing project?
+SuperMotoMe It depends. Sometimes you can tell by how hard it is or by just knowing what kind of paint is typically used on that. Sometimes you can test it with solvents. What is it?
Thank you for these explanations. I recently started crafting and EVERYTHING I have spray painted this crazing has happened and I have ended up throwing away my projects. I think I am about done with crafting because I am so frustrated. It is expensive to buy the project, the paint, etc. just to end up throwing it away. Then to have all these spray cans of paint left over. So frustrating!!
You can always sand back and try again with lighter coats.
@@BradAngove You mentioned that ye might make a set of videos wherein ye try do two sets one deliberately causing crazing and the other to avoid crazing. Then compare/contrast the two. Have ye perchance done this yet?
I'm interested in attempting to purposely create mild crazing to create the effect of an old guitar that has mild crazing in an otherwise intact paint job. I would like see how ye do it.
On a related vein, I just acquired an old vintage Matsumoto Teisco guitar that has mostly vertical cracks in the red finish so it looks like the paint it trying to split itself into vertical strips. I actually liked the look. Is there a way to reseal the finish and at the same time retain that cracked look? Would spraycan clear over the whole thing work?
What you’re looking for is probably checking rather than crazing. It’s something nitrocellulose lacquer does when it shrinks. Sometimes it happens over time, but you can also speed up the process by freezing it after you spray it.
@@BradAngove Ok, I'll try that on a test piece first. Would that process also work on enamels and acrylics too?
No, they don’t do that.
Just painted a plastic dust buster housing with Rust-Oleum American Accents Gloss Orange (Paint + Primer). Prepped it with1500, then 2000 grit paper. Cleaned it with soapy water in a spray bottle. Then rinsed it with distilled water from a spray bottle. Dried it with lint free blue shop towels. And finally sprayed it down with 70% Isopropyl alcohol, and dried that with a blue shop towel.
Shook the new can of paint for a full minute, then sprayed the piece with a light dusting coat. This paint dries FAST. Shot the second coat 10 mins later, which built into a gorgeous orange gloss, with ZERO orange peel, wrinkles, or dusting. It was PERFECT.
Shot it outside in direct sunshine, at 84° F, and 48% humidity, per my gauges, with almost no wind speed. The only thing I had to worry about was that errant A-hole flying insect that inevitably decides he's seeing a "huge orange flower." As luck would have it, he never showed. The piece was pristine.
And I should have taken that as a sign, and stopped right there. Afterall, it appeared to have a clear coat on it already.
But NOPE, I HAD to "protect" this beautiful paint job with a can of 2X Gloss Clear, from the same line (Rust-Oleum American Accents). After 45 mins of dry time, I "sanded down the glossy surfaces", per the can of Clear's instructions, with the distilled water spray, and a 3000 grit paper. Gloss now gone, I dried it with a blue towel, walked it out, and set it in the sun to air dry an additional 5 mins.
Went out after shaking the Clear for a full min, and started the same process as the paint job (2 coat system), except this initial coat wasn't a "dust" coat. It wasn't sag worthy either. But enough to go on as a "full gloss" coat.
Everything went swimmingly for oh, about the first 25-30 seconds. Then, as if by magic, the entire job began this amazing (albeit HORRIFYING), "wrinkle crinkle" transformation that would make the worst orange peel one could imagine look perfectly acceptable by comparison.
And now I'm "here", with the rest of the neer do well "painter" class....crying yall a river. 😂
So, thanks for the insight. After watching this, I'm now thinking one of three things happened. The "gloss" (obvious, NOW 😂) component of the "GLOSS Real Orange" paint, is a clear "built into" the paint. Duh. So, not only is a clear coat not required, but even if seemingly "sanded off", the clear base solvents were still present. So, BAD REACTION.
Another possibility may be "something" unseen, but present in the blue shop towels that was left behind during the wipe downs. Which didnt effect the paint going onto the plastic. But once left on the sanded paint surface, was a disaster waiting to happen.
Then there was the 5 min sun drying of the piece. Did the UV in the sunlight somehow act as a negative catalyst on the paint surface, to cause the reaction?
Regardless, I f'd it up. I think I'll just strip it, and reshoot it with only the gloss paint. And if you've made it this far, sorry for the sad sappy sob story whiney bitch novel I'm about to post. 😬
I've read stories like yours far too often, there's a ton if you read the reviews on the paint! Sorry it happened to you. I'm not entirely sure what causes the cracking... In my experience, shooting the clear as soon as you can after gloss allows for a better bond. This is obviously not possible if you're doing any sort of wet-sanding, but I haven't always needed to.
Anyways, if you find a solution, be sure to share it here!
So my experience with this is TBE paint isn't cured. You have to wait 24 hours or longer for all chemicals to come out. Some paints require clear be applied minutes after. If you wait too long but not long enough "24hr" them it cracks.
@@beenheredoneit.4381 👍
Do you have a video on how to fix this?? I was using Rustoleum 2x coverage rattle paint & clear on kitchen cabinets. The paint turned out great. First clear coat was good as well. Let every coat dry 1 hour between coats as per instructed. First clear coat dried overnight. Sanded with 400 & then wiped down as usual with tack cloth. 2nd clear coat goes on & I'm getting crazing in certain spots. Some of the cabinets turned out great & then I have small sections on different areas with cracking that is ugly as hell. Is my base & paint coats affected as well?
It should only be an issue with the top coat. Sand it back flat, and apply lighter coats. I would avoid the tack cloth. It may be leaving a residue that is reacting.
This happened to a guitar i just painted, i think it got too cold and shrunk, is it now just a matter of sanding and repainting?
+Pictur3PerFect13 yes, essentially that's the only way to fully reduce the chances of the problem perpetuating.
I painted my alloy wheels with VHT Argent silver one week ago. Can I put VHT clear coat now without re spraying another base coat?
I’m not sure; what does it say on the cans?
I have cracking or what looks more like shrinking of a stain under a clear laquor top coat. I believe the painter probably put to much stain on without letting it dry properly. Is there anyway to cover without stripping? Its everywhere. Can we use shellac primer over then use stain over that?
Are you still looking for a stained look finish?
I tried prime ring my guitar I did the primer two days ago. I left the primer to dry a day when I looked the next morning there was alittle bit of cracks in the primer. Looking on the internet I searched what kind of grit to use 220 popped up. Used the 220 sanded the primer where the cracks were. I took a rag and cleaned off the dust today I decided to do a second coat. Within 20-30 seconds the second coat of primer cracked the whole primer on the back of the guitar. I don’t know what to do.... any ideas brad?
Sounds like the primer went on too heavy initially. May not have dried properly. Then when it shrinks it all cracks up like that.
Thanks for the explanation 👍
I’ve had horrible clear coat problems with lines and “scratches” in the finish. As per your explanation I think it’s because I had way too much heat in my workshop. Thanks again
I hope it helps you get the result you’re looking for.
Thanks a million Brad👍 I’m sanding back the damaged clear and repainting on Monday. Will let you know what happens👍👌
Update; job worked out perfect 👌 once I kept the temperature of my workshop correct. Thanks again for the help Brad👍
Glad to hear!
I am getting long, but very fine, cracks in the paint on just one side of the guitar (the back) - all basically running in the direction of the grain.
Started with a raw basswood body - sanded up to 320 in stages, after that sealer with sanding, then wood filler with sanding, automotive acrylic primer with sanding, base coat of acrylic lacquer pearl gold followed by top coat of acrylic lacquer candy red. Let it dry for 3 weeks (it's been hot and humid here, but I timed the actual spraying session to a sunny day with a bit less than 60% humidity). After the first week it looked ok bar the little hole from a piece of dust I tried to remove, but now on the back of the guitar there are a few long fine cracks that show when you look at it from an angle in the right light.
Would it be enough to sand away the red candy layer and re-apply gold + red candy, or should I go further down than that?
You only need to sand through whatever has cracked. It must have shrunk.
You were absolutely correct regarding your chemical analysis. I was using two different brands of paint; Rust Oleum and Krylon. Both were called Appliance Epoxy. I had completed my project with the RO and ran out, but there were a few holidays. I began touch up with the K and spiderwebs or crazing came out all over, but not everywhere. It reminds me of that chemical that removes paint from cars; it just seems to break the bond.
I think I bought the RO at Walmart. The K I bought at Lowes.
Damn. Sorry to hear that happened.
Good JOB! It is a rarely these days..
Love to see how to repair it or shall i say redo it.
yeah..just talk talk talk not even a picture
Ya, this video was about how to avoid it. To repair you need to sand back smooth, clean, make sure it’s fully dry, and then recoat.
Bing! That’s why - I put it on too heavy - thanks for the confirmation.
Informative
Good information, great job... I would call aged laquer "crazing"... I would call Lacquer over cheap enamel "wrinkling" "peeling" or "stripping" & I would call too much paint, solvent speed issues or temperature issues "cracking", "splitting" or "crackle". But the term "crazing" to me I would reserve for old paint jobs usually Nitrocellulose Lacquer, that get brittle & crack over a long period of time, humidity issues or sun exposure... maybe decades. Lacquer can be shot and adhere on urethanes & even some enamel if they are well sanded, shot with a quality adhesion promoter like 222s (formerly Dupont, now Axalta) Sometimes you need to spray the first coats of Lacquer dry over the 222s if the enamel is of low quality catalyst. This will help avoid "wrinkling" the cheaper enamels. A quality "sandwiched" airbrushed lacquer artwork (Urethane/222s/lacquer/Urethane (Imron) finish can last for 40 years in the Florida sun with no crazing or pealing.... Guitars often have "crazing" when they were painted in nitro and get old. I went back to 100% Polished Nitro Lacquer on all my guitars due to the exceptional sound of Nitro. Finally one more source of wrinkling is laquer shot too wet with slow thinner or retarder that is then cleared in urethane before the solvent leaves the lacquer... for this reason it is advisable to use fast thinner with no retarders (wash thinner) to spray lacquer if it is intended to be cleared in urethane. Blushing due to moisture and fast thinner is not an issue if the lacquer is to be clear with urethane just sand with 500 and clear it. Everybody can call me out now "OLD SCHOOL"? :)
I believe the industry term for the cracking in aged lacquer is “checking” rather than crazing.
I spray painted an interior/exterior Premium paint +primer Gloss enamel on top of a chair that has some paint on it but needed touch up and was going to repaint the whole thing and it immediately started crazing. I'm sure it was a chemical reaction. I believe I will have to sand all of those areas and repaint . How do I know what what kind of paint to use.
You could just sand all of the old paint off and use whatever you want essentially. Otherwise, you may want to try just sanding the crazing to get everything smooth and then adding a very thin coat of the same paint to see if that resolves the issue.
I've been working on a travel trailer, aluminum siding - white... I've fixed and have gone thru 3 cans already, various spots...but I'm doing the front. 4 spots I'm getting cracking after 1 can....it was days later dried...temp 56-65'f
I thought it was the new can....I really sanded and cleaned it again with a different can (same automotive rustolum gloss white) did it again in the same area too
Cracking isn’t caused by old cans, it’s caused by paint shrinking. This can occur from temperature fluctuations, or if you’re layering too much too quickly.
So I’ve painted my wooden dresser with a white wood stain and I used a clear enamel spray. Whenever I spray it, it begins to crack. How am I able to make it from happening again and how do I fix it without messing the whole thing up?
What kind of wood stain is it?
Can not dried up wax and grease remover cause this as well? I usually wax and grease remove the panel before spraying but I’m not sure if I am not letting it dry and that can be my problem.
That could be the issue as well, yes.
Hi Brad, really appreciate your videos. I'm painting a bike frame (aluminium + montana gold) and just sprayed my 2nd coat of SprayMax 2K matte. 1st layer came out nicely, cured 24 h and lightly sanded with 800. 2nd spraying crazed/crackeled in parts. I suspect too cold & humid + too thick of a coat... can this be saved? Can I - let it dry, sand down the bad topcoat and give it another go with a fresh can of that expensive 2K? Cheers
Yes, that’s how you would go about fixing that.
Hi, Ive never heard of that 2K paint till just now & I found it on Amazon. Whats special about it? Did you say you sanded (wet?) between coats w/800? Were you able to resolve the crackling? Ive just painted a portion of my truck w/Rustoleum Professional Gloss White & had the 1st coat come out gr8, but the 2nd coat (55hrs later) crackled in 1 spot. Thanks.
Have a look at my video on how to get a professional looking clear coat with spray cans.
Does this happen with spray painting your inner headlight housing as well?
It depends on how you prepare the surface. It can happen on almost anything.
i was spray painting over some paint i did yesterday it was completely dry but the recoat caused it to crack
Hey brad. I’m an automotive painter. Our base coats are water based... I’m wondering if I can use our water based base with lacquer? I’m wanting to paint a telecaster with vintage amber on the back and sides with gold flake on top. Do you think I could spray a water base coat then apply the gold flake in lacquer?
I’ve used lacquer over water based paints before and never had a problem. Just make sure it’s 100% dry before coating over it. Lacquer doesn’t like water or humidity.
You should be able to add flake to your first couple coats of lacquer.
I have a spray paint bottle. When I spay the paint comes out like cloud. Doesn't dry quick. N when I opened the nozel n tried to clean, the spay head popes out due to air pressure. Please suggest
What do you mean a spray paint bottle?
I was using lacquer thinner to even out some touch up paint. I had put a piece of tape to mark the area. I think I went a little overboard with the thinner. The tape seems to have absorbed some of the thinner when I lifted the tape, there is a small area of the clearcoat that appears to have slightly“raised” “lifted” or “expanded” it’s only visible against the light. I’m concerned that the thinner penetrated into the there might be some crazing in that area later on. It’s a factory finish. What do you think?
What kind of paint is the factory finish?
@@BradAngove Plain white, BMW 3 years old. I suspect if there’s a problem there, it might be more visible if it was a different colour. I don’t see a hint of change or discolouration on the white itself. Funny thing is the “raised” area is further away from where the tape starts absorbing the thinner. You would figure an oddity would appear where the tape is most saturated by the thinner but the inner area of saturation looks fine. It’s barely visible anyways, it could almost blend in with the orange peel. It’s not an issue, just concerned if something will happen long term.
Thank you for the explanation of paint crazing. I totally screwed up my first paint job where I had bubbling on the hood and top of my car and shrinkage along the edges of where I painted. It has scared me to not repaint the car. I want to overcome this huge failure but I am driven to learn how to paint better. Should I wait at least a day after primer and a day after base coat before I do a clear coat just in case to avoid trapping solvent? I appreciate any and all advice in advance. Thank you kindly!
What kind of paint are you using?
@@BradAngove I used a 2k paint and a 2k primer
Yeah I’d give it a day or two to be safe.
I had a terrible reaction when I used celluose spray paint on top of a Oil based paint in a stencil.the paint shop said that the solvent based spray should be fine with the oil, but it totally reacted started to bubble & peal.any advice!..
They probably didn’t realize that you were using nitro over it. That combination is a recipe for disaster. Switch to a poly clear coat.
I’m using laquer on wood. I always spray with under coat before final coats. But sometimes in small areas it cracks and fall off. What is the cause of this?
What kind of undercoat are you using?
Hi so if I have Is wrinkling on clear coat do I let it sit for about a week and then try to send it with 2000 grit to get the wrinkles out?
Yes let it dry fully then sand smooth. I’d use 800 grit.
Im not that good at english, but i have tried painting alkyde lacquer over acrylic lacquer primer. The other components i do not know, but the primer melted. So i guess those two do not match very well.
I accidently got that effect on a pickup cover once. I believe it was reaction related but wasn't sure exactly what paints I'd used. I must have tried a dozen different colors of paint for the hardware on that build. I've been wanting to reproduce the effect for a long time now. Based on this video, I suspect it was lacquer followed by enamel, followed by more lacquer.
Do you kbnow of a combination of paints that will cause cracking, yet leaves a durable finish?
No this kind of cracking. It’s indicative of a paint failure. There are crackle finishes though that are durable. I have a video on those.
@@BradAngove Thanks for the tip - you're my goto for paint guitar finishes. I'll check out your vid on crackle. I tried some tests with crackle, but it was cheap stuff designed for metal valve covers and such - not impressive on wood.
Is it worth painting my Artcore (Go-to) or just let it crack and still play like gold? I am not an expert and the binding is still gorgeous. It's a silver sparkle but I'd go satin black if I was not scared of F-ing it up.
Haha well that decision is going to have to be up to you!
if your paint is cracking (for acrylic paint I used crafters acrylics from the dollar store)
Most likely there's to much layers or the paints drying crackly, USE A BIT OF WATER I did and the cracking stopped!
So when painting in the cold what is the best advice ?
Should I warm up my parts and spray paint
then let dry in the heat as long as I can ?
Or should I just paint my parts in the outside weather and let dry in the same temperature without using heat ?
It’s depends on what paint you’re using I think, but I’m not sure because I never paint in the cold
itd be great to hear something about "resolving" it. Do I have to sand it down and re-start or can I lacquer remover/thinner the crazled paint down with a rag?
I would sand until it’s smooth and go from there.
@@BradAngove Yeah I tried the thinner but it didnt do anything so I went to 400 wet sand option till the crackle went away & resprayed it to match the other areas. thks.
What is the best way to induce checking when painting nitrocellulose?
+Jeffrey telmo Checking is a different thing entirely. Some people do it by placing the recently painted object in the freezer. There are also products available to help create the effect. Alternatively you can add it by hand with a razor blade.
Hi there! This is very informative, never having dealt with something like this before, I really wanted to understand where I went wrong. I am doing a DIY in my bathroom on the countertop with Rustoleum Appliance Epoxy spray. I started to get this problem and I think it’s because I didn’t wait the 30 minutes for the next coat.. I waited a day. So now, sanding like crazy to get it smooth and guess I will wait a week to recoat (since the can says recoat in 30 min or a week). When I recoat, I will be sure to do much lighter coats. You live and you learn, right?! I learned on this one for sure!!! 🤦🏼♀️
I hope the recoat goes well.
Im trying to get a clear coat enamel on my motorcycle gas tank that will purposely crack and have the spider cracks throughout it. Do you know how to mix or the correct mixtures of clear coat and hardening agents to make this effect? I would appreciate the help and knowledge
I don’t know how to mix that with adding in a crackle agent.
Had this happen on the windshield surround I painted. Laid out the clear a bit heavy and the end result was crazing. It appears to be in the clear coat only, can it be sanded and buffed or should I sand to base coat and respray clear? (Using rattle cans)
Usually the full layer crazes. You’ll likely need to sand flat and then re-spray some clear.
I got crazing/ cracks on my post catalytic lacquer on top of a furniture piece that had shellac and paint but only on the top which is weird - I also got it with paint when I painted over lacquer
Did you lacquer it outdoors in direct sunlight?
I was getting cocky with a huge trailer I've been painting outside, in December, in Florida, parked with one side southward and one northward. I painted the tail and the south side with zero issues (first real paint job I've done other than interior). Got the nose started and the north side. North side had a few areas that were "crazing". After some research and consideration on the specific spots that this was occurring, I'm thinking it's because they're spots that are relatively cold (relative to the rest of the trailer, which 68-75° Florida "winter" isn't cold) and therefore dry significantly slower.
Thanks for the video and the reminder to not get cocky, slow down between coats.
Glad you seem to have gotten to the bottom of the issue.
Hi, Idk if your going to answer this or not asap, I'm painting my bed room like right now, I bought Caliwal paint and started painting my room, the paint was awful to me very watery and didn't look right to me after multi coats , so i went out and bought some Behr home depot paint, the paint started to do some some crazy crap as I'm painting over it. So now my smooth walls look like ugg. But I'm doing this by myself and it's a lot of work, so I waited like two weeks to repaint over that mess, I mean It looks very textured now.. I'm on my way to go buy a one coat paint at home depot to see if that will help....I regret buying the Caliwel paint... and that paint is expensive. I have no other options I can't tear down my sheet rock and start all over. I do not even know how to do that. Plus I spent so much money on paint already and my bedroom still not done.🤦♀️ IDK what to do😫😭
The typical fix for that would be to get one of those large sanding blocks that drywallers use and sand that texture off before moving on. Just adding more paint to it won't remove the texture.
Thanks
Good food for preventative measures. (Hind sight and all, UHG)
I know squat about painting . . . GOT these y block valve covers, put on a good coat of tremclad hi heat gloss black (which by the way is a medium gloss at the most, maybe ) but for these covers I wanted hi gloss and heat resistance. So I sprayed the heat paint on bear metal wiped clean first w acetone then within 10 minutes sprayed tremclad hi gloss normal paint. Both good layers. Was really glossy and looked great.
A day later I noticed at the edge of the flanges a tiny glimmer of steal I missed painting, so I sprayed these edges and a few spots on the covers again. Now I have alligator skin texture valve covers. I'm going to leave paint on and allow it to thoroughly dry like for a few warm days or more, sand with fine paper and try again.
I'm guessing the coats were thick and haven't thoroughly dried enough.
(Or the hi heat paint is another chemical).
I don’t really have any experience with high heat paint, but those recoat times do sound problematic especially for relatively wet coats.
I sprayed candy paint over silver paint and a week later I’m seeming lines in the paint. I wonder if it was because I used a spray can primer. Also it was a bit cooler in temp.
Certainly could be a temperature thing. When it’s a reaction between paint types the effect is usually pretty dramatic.
I made a windowed side panel for my pc and I do know how to use spray paint but for some reason in one spot maybe a few inches wide, it wrinkled pretty bad. I used primer on the acrylic, then spray paint and an hour later I checked on it and it wrinkled! I scraped it off and used paint thinner to clean it off on that spot to try again but for some reason it still wrinkled, even worse this time, I might just have to start over and get a new piece of acrylic.
acrylics are not good with certain solvents, e.g. I have water blocks from EK, thay advise that at no point should you use IPA to clean them, now in electronics IPA is used a lot to clean things!!! but if you get it on acrylic a few weeks later it can actually shatter. It breaks down the bonds in the top layers of plastic and then the whole piece is under tension, the stress propagates and later on... bang. If it doesn't, you get cracking and wrinkles. I would recommend checking plastics and paint compatibility and using proper plastic primers as a bare minimum, even the base coat can dissolve the primer a little if it goes on heavy and that would let the solvents near the plastic.
Do PH changes also effect this? I'm using limewash on I assume a latex or possibly oil based wall (underneath, plaster). I would have scraped down but found a primer would help adhere without removing. Initially I used shellac based because of third-hand smoke and realized (of course) the alkaline lime would break down shellac. Recoated with acrylic primer and still some light crazing. I am finding nothing to this problem. Do you have thoughts on this?
I’m not sure if alkalinity is the source of the issue or not. I could be.
@@BradAngove thank you, Brad for replying so quickly. Outside of my issue your video was very insightful.
Ugh this is happening to me! Of course your temp point is super helpful- I’m in AZ and it’s 85 at 5am 🤔 guessing that’s still too hot since I’m still getting the crazing - yes painting that early!
That could have something to do with it for sure. It depends on the paint type.
Just happened, sanded smooth old paint and surface, but could not sand inside the wiring cavities, scrubbed the guitar clean including cavities and sprayed some Zinnser BIN white spray shellac and the areas in the cavities all wrinkled, the rest of the guitar where i sanded smooth were fine
Would a layer of dry rustoleum paint with a layer of acrylic lacquer crack
Which rustoleum paint?
I put clear coat on my headlight after I wet sanded it. I cleaned the headlight before applying the clear coat and let it dry. I sprayed the clear coat And it completely started cracking or shrinking like you said. How would I fix this
Use adhesion promoter, make sure your clear is compatible with plastic, and apply a couple light coats at the start.
@@BradAngove, I ended up wet sanding the clear coat off and buffed the headlights with the compound given in the 3m kit, then I sprayed 2 coats of meguiars headlight coating and it's looking normal again
So for me its better to take my bumper outside and my paint mixture outside so both will be cold and ill have no issue cause if the weather cold while drying temp will changevand make spider, wrinkles or am i wrong?
Paint doesn’t work properly in the cold.
@@BradAngove its about 18-20c now, but tommorow morning will be about 20-21C so is it ok ive kept everythig outside preparing for tommorow morning
Anyway ill give it a try, light coats wait15 minutes between base coats
Then spray clear coat after 1 hr and between clear coats am waiting 10 minutes as per instructions ill wait 20 minutes usually 2 layers of clear coat iam doing and thats it
@@BradAngove update Just finished and its perfect, i love it, ive dissasembled the fender now and prepared it for spraying will do that tommorow morning
Man iam enjoying painting and spraying in this weather no dust and bugs 😂, but our neighbors thinking iam parting the car 🤣🤣🤣
Will fix fender at night after spraying and will check how to dissasemble front door after that 400 grit sanding and take it to the roof for painting 😅 my paint booth is the roof in our biulding 😆😆😆, i know many people in my country will say take it to the shop to do it for you, and i feel that there is no relation between me and my truck if i let the shop do it and ive already bought all mateials which will be waste 😭😭😭
Which is not fair so ignore people and do what you like and enjoy your life 👍👍👍
Sorry for long post 😆😆😆
@@Sroor2023 I'm glad to hear it went well.
I have heard that there are different types of spray paint, acrylic, and enamel. How can you tell if a can of spray paint is acrylic or enamel? Of all of the colored spray paint cans that I have, none of them specify whether they are acrylic or enamel. I understand what you said about mixing types of spray paints and that many factors may play a part with a paint job to craze, but how can I tell if a can of colored spray paint is acrylic or enamel? Am I overthinking this? Thanks.
Check the manufacturer specs online.
What can I do wen my paint is cracking because of the undercoat or the under paint.
You would generally need to sand it back flat and add more light coats to fix it.
Trying to figure out why paint is cracking for a customer I sold paint to which happens to be a sister company I have my suspicions but will be looking into it further on Monday once I gather all of the facts.
Things that I already know.
1. Small office building has humidity issues.
2. Found mold behind walls with wallpaper.
3. They had to replace most of the drywall.
4. Was painted with a primer then painted with a professional grade paint and had to apply several coats.
5. One year later, walls are showing up with fading when someone rubs it. Also has started the cracking.
6. Supplying new paint and suggesting to prime with Kills2.
7. Complaints already about how sample colors look yellow in one room and tan in another.
Just wondering if it’s due to humidity still in the office and what other questions I should be asking.
Thank you for your video. It was helpful!
Is the temperature there fairly stable? How long did they wait between primer and paint? Need to make sure the primer and paint were compatible of course.