I didn't actually know about the acrylic being supplied with a paper mask, and makes a lot more sense as the plastic film melts at the edges and draws back, then when I spray the paint makes the edges curl too. Oh and yes I am impatient when spraying, why spray 20 coats when 1 will doWilly Ivy wrote: Sat Nov 30, 2019 Ian, when I purchase acrylic I try to get it with paper protective covering instead of plastic. The plastic tends to melt and does not perform as well. If what I purchase only comes in plastic film, I remove it and mask it instead. If you paint it after engraving, use multiple light coats of paint and don't try to do it with one heavy coat.
I have used "masking tape" at times, but i'm sure there's a better alternative as the stuff I use is quite thick in comparison to paper, wonder whats available/recommended in A3/A4 sheet sizes
