How to cut acrylic plastic light fixture cover

In this video I show how to cut those acrylic light fixture covers simply with a utility knife. The product used was Duralens Prisimatic Clear by Plaskolite available at Lowes.
The key is to clamp the plastic between two pieces of wood. A piece of plywood below for full support and a 2x4 on top as a guide, use a new blade on your utility knife then make many light pressure passes from the smooth side until it cuts through. In this video it took about 8 passes.
Cutting with the least amount of resistance or pressure is the safest way to cut. So a grinder or even worse a saw with teeth is more likely to break them. Clamping and cutting half way through with a knife then snapping is the manufacturers directions and if doing a lot it works fine ( I did one pass and snap 4 times on my waste to fit my trash can and it never fractured). However many don't cut far enough through have a dull knife or the plastic was old and brittle so they end up breaking. So if doing just one why risk it clamp and light cuts until all the way through.
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Thanks for watching and good luck on your project.

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I remember years ago when I cut it last time I used the grinder with the metal cutting blade and that would be the reason why the other cut was ragged. It's just too aggressive. This time I decided to cut using a knife as the manufacturer recommends. They actually say you can snap it after one good cut. I did try the single cut and snap to get rid of my waste on the old one and it worked perfectly fine but multiple cuts only took a minute longer and was perfect and smooth with no chance of breakage. With so many fail at the snap method its probably better to use the multiple cut method I demonstrated.