These are so cute! I got some ideas here. Have been working on a design but haven’t wanted to devote time to a two hour engrave.
I had some old 1/2" acrylic that was just beastly getting the masking off. Now that I have a heat gun I’ll try that, but when I did it by scraping, the residue just wouldn’t budge. GooGone helped but I finally gave up on it.
We have dove very old acrylic laying around and sometimes you just can’t get the paper off:-(. It becomes one with the plastic! Heat gun works good if the adhesive isn’t completely dry. I have had hit and miss results for solvents.
One trick on sheets is if you can get a corner started wrap it around a dowel tight then roll the dowel across the piece wrapping the paper up with it.
I have had some 1/4" acrylic in the garage for the past 10+ years and because of the desert heat, some of the paper masking is baked on while the other half has dried up and released itself completely cleanly.
The soapy water soak works “OK”, it’s not fast or efficient nor even easy but it IS certainly safe for the material and easier than peeling little ripping paper slivers bit by bit.
I would expect it to remain removable.
The molecule is a hydrocarbon, straight chain, so the breakdown products will be co2, possibly gaseous hydrocarbons, and water, probably, so it will only ‘lock’ to the surface mechanically, if at all._