EASY: Spray rustoleum with an HVLP | Forget those aerosol cans!
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- čas přidán 22. 03. 2019
- You have a project that needs some paint? Aerosol paint cans are convenient for sure....BUT Rustoleum in bulk is pretty cheap! Setting up a $9.99 harbor freight gun is a piece of cake! Modifying Rustoleum to spray through an HVLP is well within your skill set. Trust me; your project will thank you! In this video Ill show you 2 different mix ratio's. One is the ratio that Rustoleum recommends on the label. The second mix ratio is one that I've used extensively on my own projects. Both work well through the HVLP gun and both should leave you with a great finish that will last.
*Be sure to check out the Japan Drier video!!
• JAPAN DRIER -the secre...
LINKS:
VALSPAR catalyst\hardener: amzn.to/2CvaPUX
KRYLON catalyst\hardener: amzn.to/2FnMXmN
Reducer: amzn.to/32GZb4d
Acetone bottles: amzn.to/2JzqxEr
Mix cups: amzn.to/2DjTi5J
Mix cups (50): amzn.to/3aQLKnm
Filter mask: amzn.to/2FnGLLu
Filter cartridges: amzn.to/2JE9bGu
Disposable jacket (10pk): amzn.to/2Fnk36n
Shop air system filter I use: amzn.to/3fodoKb
HVLP: I'd recommend starting with a cheap one from HFT. use a coupon or wait until they go on sale. they can be had for as little as $9.99. The gun in this video was a Jobsmart from Tractor Supply I got on clearance for $12 or so.
#hvlp #howtopaint #rustoleum - Jak na to + styl
I wanted to apologize for the audio, I didnt realize the wind was messing it up so badly until I started editing. I added a few product links in the description.
1:18 Intro to paint and thinners
5:55 setting up your HVLP spray gun
10:22 mixing paint so it will spray
12:35 spraying techniques
Thanks for watching!!
Hello please recommend a clear coat to apply on this mixture. The one I used wrinkled and bubbled badly. Thnx Norm
No problem audio was fine
I want to paint my several Tractors I have paint from Tractor supply have you ever heard of their paint, they have the Hardner and Catilzer, thanks Ken
@@normvillanueva9874 Oil based enamels are considered single stage paints, especially with hardener added. No need for a clear coat.
To build on what @@50Caldemigod said it is easy to mix up single stage / two stage paint systems with 1k / 2k products.
Single stage paints = paint only, no clear coat. Two-stage = basecoat and clear coat. 1k = no hardener (catalyst / activator). 2k = hardener.
This is where it gets interesting. You can shoot a single stage (paint only no clear coat) and depending on how it is formulated with or without a hardener. If it is 1k single stage no hardener, it depends on the solvents flashing off to dry. 2k there is hardener and is more durable.
With two-stage basecoat / clear coat system it can be a combination. The base coat may or not be 1k or 2k (no hardener, hardener) however the clear coat will always be 2k. It can be confusing but if you get it wrong at the mixing table before entering the spray booth it's going to a very bad and expensive day.
Just the way you presented in the first 30 sec.... I knew to take this seriously 👌
This is the best how to get started painting with an HVLP that I have seen so far. I feel like I can now go out and paint something by watching just this 1 video.
Thanks for the feedback! It makes all that filming and editing worth it
I don't know why this guy got any thumbs down but whoever gave him those thumbs down are probably just haters this guy explains a lot of good tips good job
Thanks, glad you gleaned some information
Yeah man! I learned a lot from him.
I totally agree 👍
Maybeeee becauuuuse...he doesn't know wtf he's doing
@@Iknowyoumadnow I don’t know. Is your comment speculation? If you’re knowledgable, do you have some specific points you could share so people know what’s what? Thank you.
I have watched MANY vids on how to paint using rustoleum paint. Yours by FAR is the most helpful. You talk slow enough to listen, to explain thoroughly, you write stuff down so I can screenshot it, and you demonstrate pros and cons. You have been taught well and a HUGE thank you for teaching me. My first project will be painting my 7x16 white enclosed trailer. Fingers crossed.
Best way I found to check if paint is dry
Have a part or same material (metal, plastic) whatever your painting.
After you paint your part lay a medium to heavy coat on the test peace last and use that to check if your part is dry
So you never have to compromise your part
I do this as well... but 1/2 the time I forget to spray the test piece :-)
@@grumpycat5991 🤣✌️
Thank you for sharing your knowledge. This is one of the best tutorials on basic painting I have ever seen or read about -- considering the basic equipment used, the 'open air' environment and basic preparation. I also agree that if one is to undertake painting an entire car or motorcycle, upgrading to higher quality of materials is a very good concept to follow. Thanks again!!!
Just watched for the second time, I’ve done a lot of painting but I’m always eager to learn new things. You are a good instructor, I learned a few things. And thanks for reminding everyone of the importance of wearing protective gear.
Basically everything I need to know to get started. Great job!
Thanks for the tips and mix ratios, you’ve inspired me to pickup my HVLP again over buying the rattle cans.
Damn solid, good info. For us that are challenged through lack of experience... this is very helpful.
i bought the same spray gun, and am near finishing repainting my old toyota... GREAT video. Thank you so much!
This is the best comprehensive introductory video to using this type of paint sprayer. I especially appreciated the insight and instruction @ setting up the spray gun.
It was great that you took the time to thoughtfully consider what was worth sharing, especially the written additions on the screen. I loved how clear and professional the language was. I have saved the video hoping to benefit from it more as I approach an upcoming project. Thank you.
Thanks for the positive feedback. Im glad it helped you.
I've always been one to believe in going back and reviewing material you've already covered no matter how "advanced" or "an expert" you are. You never know when you'll discover something you missed. In this case; that tip about runs. That's freaking awesome. I'm liking and saving this video for that alone and am going to use that tip first chance I get.
Great video! I've used Rustoleum many times for jobs around the house; painted my outdoor iron furniture, repainted my tractor, an air compressor, and an old shortwave radio cabinet. All came out great and the outdoor furniture is still doing great after 2 years with no rust returning. You are exactly right, the Hardener is a must for a hard durable finish. Keep up the great work.
Thanks for this comment, I always enjoy hearing about various projects and how they're holding up.
I've been spraying for years as a hobby. I learned a lot of great tips! Great job!
Thanks for the feedback!
Damn you man, why couldn’t I have found this video sooner. From the over spray technique to the doors with the barrel hinges. Thanks for putting this together!
Great tips! Back in the late 70's I pulled the engine out of my classic T-Bird for a rebuild then I pulled all the wiring harness out of the way and sanded the engine compartment then I sprayed it with Rustoleum primer then Rustoleum satin black. I still have the car and under the hood still looks like the day I painted it. If you were wondering, the car still has the original paint that looks real good and it's a nice shiny black, a special car.
It would be interesting to see how the rustoleum recipe has changed over the years. You cant go wrong with satin black. Thanks for the story!
Great instruction. Will apply to my next set of tractor wheels. I had good results on my first set of tractor wheels but I really could have used your instructions to save a lot of time. Now I feel confident I can move on to the tractor sheet metal.
This is a fantastic video. Thanks for sharing your knowledge
I just saw this video and I was impressed with the way you explain each detail in such a simple easy way to follow. I learned a great deal by watching your video. Thank so much for taking the time to share with us your knowledge and know how.
Great video, it’s hard to believe painting a car is not as difficult as we thought in the past . Yours and others video speaks volume. You are doing a great job . Keep it up .
Great video mate best technique and tips I've seen in one video, thanks for sharing.
Thank you for your times to show us that valuable information about paint job like this. My personal have learn a lot from your video! Once. Thanks
Thanks for those tips! I recently purchased my HVLP gun and set up to paint my jon boat. I started with some lawn furniture and wow! I am ready to start the jon boat now... and a few of the things you mentioned about how to lay down the paint without leaving a tiger stripe were bang on. Thanks!
Thanks man. I plan on painting my kitchen cabinets with a new spray gun I just bought. Your tips will come handy. BTW good video.
Using spray cans was getting to be very expensive and I was getting inconsistent results. I wanted to learn how to spray paint using HVLP gun. This is a great video. Thank you very much.
This is probably the best guide to spraying Rustoleum that I've seen yet.
thanks for watching
Got inspiration here to get off my butt and go spray something! Thanks from Colorado for the video and all the tips.
Super useful video. I like your style! New to the channel and very much enjoying a quite morning exploring your content. 👍🏻
thanks for the info well appreciated. like how you take the time to explain your the man.
Best spraying video ever. Thank you for the excellent education.
Really enjoyed your practical tips and showing examples of them.
THANK YOU! Usable info, proper instruction. Really appreciate you sharing your knowledge.
Liked and subscribed!
Thanks Bruce!
Another trick for runs is to lay tape on the run and then pull it off
Its a cleaner way to reduce the size of the run
Then jus add lay down another coat of paint
It works great
I should have looked at the comments first before I posted the same thing that you did my bad LoL
Started using rustoleum to paint work trucks years ago great to have a can behind the seat to touch up scratches, keeps an old work truck looking sharp for years. Cheap as hell, catalyst definately recommended.
Top notch presentation. He speaks clearly and takes nothing for granted. I learned a lot here.
I almost laughed this video off. I have done a lot of projects, spent a lot of time in the garage, ask my wife LOL! This video is full of good advice and common sense tips. I don't use rustoleum paint, but that definitely doesn't lessen the content of your video. I checked out your channel and subscribed. Thank you. Semper Fi USMC.
Thanks!!
Helpful tips. I got a few things that i need to paint this weekend. Will use these tips when mixing and spraying rustolium. See if it turns out better.
Very good job on this video. Good instructions, on mixing ratios. In general, I like rust oleum paint, it's good paint at a very reasonable price. I just subbed.👍
Pure Gold. Best beginner's HVLP painting tutorial on CZcams!
Glad you think so!
Thanks for this video--it helps me.
Great Video! Informative and easy to follow, subscribed.
One of the best videos of its type I've ever watched, excellent job!
Thanks!
Just painted my camper using your tips and techniques. Turned out great! Thanks for the video!
Glad it helped! Thanks for the update!
I found this video very interesting. I've never used a real sprayer before but I I'd like to learn how to do it for my own projects.
I really liked your video. I found it to be very informative and helpful. I used to spray a lot with rustoleum and got good results, although all I ever used was thinner so I’m going to have to try your method and see how I like it. Just fyi, when I was working in the mines, we found that rustoleum was the only paint that cyanide wouldn’t eat up within a very short time. We were using brushes to paint with but still got very nice results. Keep up the good work and thanks again
Finishing my gate project and looking to piant them. Appreciate you sharing your knowledge.
A ton of useful information....well organized and easy to follow.
Dang man, as a total beginner this was a HUGE help. I personally went with the store bought reducer and catalyst (picked up both at Tractor Supply) worked wonderfully! Thanks!
P.s. clean your gun well!
Hey thanks for the video. I've always been fascinated by these low budget paint jobs for some reason. I pretty much knew everything you said in here only thing different would be the overlap. I always did 50% but I will do a 70% next time I spray just to see how it goes.
Lots of great tips and pointers! Thank you for posting!!
Outstanding tutorial-thank you so much for sharing your experience and knowledge…😊
I never thought of adding catylist to rustoleum for around the house spray projects instead of the can. Thanks for the tips.
In my experience doing it I have only seen benefits
Patrick Shea if it contains methyl di isocyanate go to dangers of on CZcams before spraying heed them or you may end up in hospital
Great video. I've been wanting to save some $$$ on paint. I've redone boats and I restore furniture for fun. But rattle cans get spendy. Thanks for keeping it straight forward!
Thanks for taking the time to make this video. I have used the info with good results. I rewatch from time to time to pick up a tip or two that I missed the first time around. Thanks.
THANKS MY MAN!!! YOU ARE VERY THOROUGH ABOUT EXPLAINING YOURSELF. I WANNA JUST LET YOU KNOW THAT I APPRECIATE YOUR EXPERTISE ON SPRAYING OUT OF A SPRAY GUN AND THE TIPS ON ALL MIXING INSTRUCTIONS THANKS A MILLION BROTHER MUCH LOVE AND RESPECT. KEEP UP THE GREAT TUTORIALS THEY DO HELP THE LESS EXPERIENCED SPRAYERS AS MYSELF...100% 👍👍👍
This video is pure gold
So is this comment^
I have been going at the W&F stuff again since retiring from the fire service and once again doing some fixture, and ornamental stuff in my little "home based" shop. This is where I really began using a lot of the rustoleum product line. Your assessments of the rustoleum product line and application of it are pretty much spot on for what an how I use and apply it with a couple of slight application and reduction modifications. I was looking for a way to make the rustoleum applications on the ornamental come out with just a little bit of a rougher finish without having to add any challenging particulates or texture materials in the mix. After a little experimentation with some application technique I came up with a way to get the finish I was looking for by doing a 3 step process of application. I thin the rustoleum to about 20% with acetone, using a 1.4 or 1.5 tip first step is to spray the first pass pretty much as normal for a good wet coat. Give it about 7 - 10 minutes to get tacky, then reset your gun by leaning out the paint flow a bit, increasing the pattern spray, and upping the air flow a bit. Hold your spray gun back about 50 - 75% further away than for your finish coating and make your second pass. This creates a controlled and even light over-spray pattern on top of the already applied wet (now tacky) coat. Now there is a third pass made after waiting another 7 - 15 minutes again with the gun reset to a proper finish coat pass. Shoot your third and last pass a little lighter than the initial wetting coat, but a nice even coating same as the first pass.
Once everything has fully dried and cured you have a finish which has a nice somewhat grainy pattern close to the iron look of a finished ornamental iron piece while still having a nice satin finish. Takes a little practice, but it makes the finish product look more like ornamental iron work than a smooth steel look. Works if you are using aluminum for your ornamental work as well, but you need a good etching aluminum primer on the work first...!
Oops bad or backwards statement in my reply... I thin the rustoleum WITH 20 -25% Acetone... the way I wrote it looks like I thin the rustoleum to 20%...!!
This is what I was looking for. EXCELLENT!
Superb video! I'm restoring a 1965 Rockwell 34-450 Unisaw, and this has given me the confidence to venture forth.
How could this guy possibly receive 173 thumbs down?. This tutorial is awesome!!
I have read and watched many CZcams Vids on this topic. I painted my old beater BMW e30 with rustoleum gloss white professional. This video ranks at top of list for play by play steps and tips.
Thanks!
Phenomenal video sir. Thank you for honing in on the small details! Very helpful
Thanks man! Just what I was looking for!!!
Thank you. You did a wonderful job on content and presentation. You should do this for a living.
When I had a used appliance business, I got good results by thinning the paint with Naphtha. I found that paint thinner was way too slow, and was oily. Sometimes it didn't harden at all with thinner. I found that Naphtha dries maybe a little slower than acetone, which gives the paint a chance to smooth out. I just shot the paint outside, and most people said that it looked like a factory paint job. The paint I used was Zynolyte Epoxy, but they don't make it any longer.
Thank you. Enjoyed the help navigating this. Great explanation and now I will spray soon
Great video, very detailed👍🏼
Wow very good video great explanations thanks
thanks for watching. Glad it could help
I started spraying 40 yrs ago. Hobby/Cars, whatever. A bad compressor, was expensive as heck. A good spray gun was $$. Laq Thinner and turpentine was about all we had for mixes. I setup a double compressor into one large tank. 100 psi was the first, then an auto-air conditioning compressor. It was on a continuous motor and the electric clutch was turned on and off, by the air regulator. The motors never stalled and the pressures were consistent. I was using HP guns. Cheers
Thats pretty cool. These days the air flows at a constant rate, the guns are consistent BC they made with CNC production and the paint options are endless. Its probably pretty cookie cutter compared to the old days. There's probably less skill required on the spray technician's part now too. Thanks for watching!
Thank You very much ! One of most serious videos about this theme and car painting at all ! Respect ! You could be a teacher... no kidding !
Thanks my friend!
Thanks for an excellent video! You answered some technique questions I had after watching other videos, and you shared some great tips otherwise! Great teaching!
A couple years ago I started fixing mowers, snow blowers etc and I figured there had to be a better way to paint stuff then just rattle cans.
Your video gave me a well explained step by step guide on how to do just that. Without your video I would have had a lot of unanswered questions. Now I have people hunting me down to paint their tractors for them. Thanks for the knowledge👍
Awesome, thats exactly what makes youtube worthwhile
Thanks very good video !!!
Great tutorial, lots of great information. Thanks for writing down the ratios.
Glad you found it useful
Excellent information. Perfect video to get me up and running spraying rustoleum with my new Graco FinishPro 9.5.
Good luck with the spray!
Thanks so much, been using an hvlp gun for years on shop projects, your video taught me a lot.
Will be much less frustrating in the future.
Thanks, good luck!
Great video! Pro tip: when pouring paint from a full can, wrap a piece of wide tape half way around the top of the can to make a spout. One gallon cans may need to double the hieght.
Awesome tip!
Another tip. Pierce two or three holes in the inner lip where your pouring and the paint will drain back.
@No Shame In Being White The can is not ruined. The lid will go right back into the groove and cover the pierced holes.
Wow! What a fantastic video showing the basics of how and what to do to spray paint using an HVLP gun
I am not into vehicle painting, but this video was still useful for mixing and proper spraying techniques. Thanks.
Great video very well explained.
My tip is have more than one at least three measured cups.As once you mix it's hard to read thru the last mixing.
Second don't premix in hot weather the catalyst will kick earlier
The catalyst is a very good additive for rustleum or other paint of this type.
It makes it tougher.
I also agree with kicking it up a notch with real urethane 2k paint.
This does not mean you have to pay alot .
eBay has a paint vender called "Speedkote" that sells paint kits of 2k ( 2 component urethane paint)
For $100. You get a gallon of paint and Hardner...you can not get that low cost ,plus free shipping , locally.
Other sources are Summit Racing, Eastwood automotive , that have 2k paint kits in gallons and quarts.
You can use Rust-Oleum on many pairs with the catalyst. But 2k is a little more money.But "real Automotive Grade ,paint.
It will wet sand and buff alot better last in weather longer, tougher, shinier!
But if your just doing non automotive thinks . Go for it with Rust-Oleum painst w/ catlyst .
Great video ,well done, explained very well !
Great info...thanks!
I am going with all rustoleum paint and clear no hardener i am trying to spend as little money as possible.
I add the reducer and catalyst first to the cup because they are clear and won't cover the lines in the cup for the paint.
P.o.r.15,...?
did a 75/25 rustoleum thinner paint job on my little geo actually came out pretty damn good did a lot of research and people even say that you can throw a 4k clear on rustoleum going to do a gloss black with a 4k on the mercedes im working on now we will see how it turns out but my little geo came out clean
Glad to hear the GEO came out good. Generally speaking Alkyd enamels like rustoleum are designed to not need a clear coat. Id definitely do a test panel. If you do clear coat make sure you give the rustoleum time to fully cure, I think they say 30 days+. Id love to hear how it works out for you. It seems people have mixed results using clear over rustoleum. Thanks SERPENT
After watching this, I promptly got off my butt and went outside and worked on a metal project! Thank you for the Great video.
Yeh!
awesome video so helpful for beginners who want to learn how to mix with the right ratios and awareness of temperature was a plus point. Not doing it right will cause paint blisters, bubbles and color fading.
Very well done video. Solid informationon mixing and gun adjustment. The sequence of setting your pattern before mixing paint makes sense and saves paint. Maybe a little information on how much compressor is needed for the HVLP gun would be helpful to some before buying one of those guns.
this is from another website: (googled ''adjusting air pressure hvlp spray gun"}
HVLP Air Pressure Setting for Base Coat Clear Coat (High Volume Low Pressure)
When spraying base coat clear coat systems, you want to spray at 26-29 PSI. You measure this PSI by pulling the trigger and letting air flow through the tip of your gun with your dial or digital readout saying 26-29 PSI.
When spraying clear coat I usually like to up the pressure 2-3 psi for a little more atomization and better flow out. 28-29 PSI being the sweet spot in my opinion.
Most HVLP spray guns will use up 10-14 scfm (air volume) at 40 psi. (Volume of air pressure per cubic foot).
another option - czcams.com/video/6eoFYTp98XE/video.html
HVLP setup - czcams.com/video/Vx4Mydjaxug/video.html
Good video. Xylene, available at Home Depot and Lowes, may be a more economical choice than going to an automotive store to buy professional reducer. I used Xylene to reduce Rustoleum Hammered Copper paint, which the instructions said to use Xylene to thin.
I too have used Xylene with good results in both the Rustoleum primers and paint. I think it does a better job helping the paint stick to new steel than ordinary reducer or paint thinner. Flash and dry time is good too. Interesting that, when Rustoleum first came out with their tall industrial rattle cans, I noticed that xylene is in the material list.
Xylene is a good. It will flash quicker than paint thinner but slower than acetone. Its a little more pure than thinner/mineral spirits. It should only be used outdoors as it can be toxic.
Great video. Thanks for making this. Was considering the turbo cans. But now I might go this route. Great tips. Thank you
Excellent and super helpful. You're a good teacher, some great pointers. Thank you!
Good to hear you got some info
Thanks very helpful. I hope to Lord willing Paint an old motor home
Awesome! Local paint shop I use, where I single stage paint jobs, won't give info out on Rust-Oleum. I thought I would try it out on my daily beater. On painting bumper covers, do I need an Adhession spray before paint? Thanks!
On plastic it is always good to use an adhesion promoter. You may also want to look into a flex agent. plastic parts sometimes require it.
Thanks Mr. Build. You live in Cali? I lived all over So Cal from San Fran to San Diego, and all points in between. Was in 70s to 80s. Lot less congested and Laid Back. Live in Phoenix now. Thanks for your response.
Wow. Super great. I'm just starting out and this really helps. ❤
Good detailed video. Thanks for sharing your tips and tricks.
HIM: "Keep that wet spot wet."
Me: "That's what she said."
classic
Well done. Super helpful. I'll give it a go tomorrow. Thanks
Thanks for sharing your tips, and techniques, great video!
Whats a good way to dial in clear?...everytime i try to dial it in i cant see what my results are because its clear. It just ends up becoming guess work again
Clear can be a lot more involved than a single stage paint or a simple oil base paint like rustoleum. Youll need to chose your reducer speed according to your conditions. Youll want super clean conditions to spray in and probably want to use a smaller spray tip than what most 'cheap' HVLP's will come with. Best advice I can give you is talk to the guys at the local automotive paint shop to get set up to your conditions. Sorry I cant help more
Generally a 1.3 or 1.4 tip. Most of the settings come down to the particular gun. Max your fluid adjustment out. Then you only have the air pressure to dial in. And once youve got the air pressure dialed in you can dial in your fan settings. Depending on gun I generally shoot bases at 30psi. You can shoot clear at 30 as well but me personally I like to bump my pressure up to 40 or 45 psi when clearing. But thats just me. Get some cardboard to spray on to set your fan pattern, and practice on some old fenders or hoods and see what works for you.
This sounds weird but practice; learn to notice the difference between wet and shiny. Shiny isn’t wet, but wet often looks like shiny...
Great video. Not exactly "budget", though. It's not the paint, gun, or even the chemicals and hoses that add up and ruins the budget aspect. It's the powerful enough air compressor and big enough tank. If more people had that we'd probably have fewer rattle can videos.
All good points. Id put a decent compressor at the top of the list for anyone looking to do some DIY car projects. They're never a bad investment.
Is a compressor that expensive?
I bought a 12gal one at a pawn shop. One of the prongs was broken on the plug, the cheap plastic hose was broken and it was attached with a compression fitting. They wanted $100 for it and after pointing out all of that plus the need to add a flow control valve to it I got them down to $45.
I then went to harbor freight and picked up the flow control valve, some quick disconnects, and 100 feet of 3/8 inch hose.
Total investment is still under $90.
To be honest, it is one of the most used tools in my shop. I use it with impact guns, paint guns, nail guns, staple guns, etc, etc, etc. Heck, my wife will put the air sprayer nosal on it and use it to clean out dust from inside stuff like the gaming system. It even gets used to air up tires on the vehicles. Have you seen what gas stations charge to put air in a tire?
If you watch the harbor freight sales you can get a lot of the pneumatic tools for cheap as well.
I agree with UnitedStatesofBuild, if you have a DIY shop it is never a bad investment!
Thanks for this comment Grandpa's Place. Every DIY garage/shop will benefit from having a decent compressor. Check your local Classifieds, Craigslist, offerUP, FB Marketplace, Garage sales and even Pawn shop like Grandpa points out. YOU WONT REGRET owning a GOOD compressor!
Grandpa's Place Unfortunately you need at minimum 10cfm compressor, maybe more with hvlp gun. They’re generally 60 gallon or larger air compressors. So $800 or more?
6cfm at 40psi for this gun, relatively low. Thats not uncommon for a 12 gallon unit to put out.
Great video. I would like to mention that many paint & hardware stores carry soft plastic "pouring spouts" that snap onto a paint can to prevent the paint from dripping down the side of the can. It also keeps the channel clear so you have a tight, dry seal once you put the lid back on
By far the best instructions , going to bookmark and watch a few times