I wanna be able to get paint off after how did you do that
I was using glass so I used acetone. You will need to find a water based paint to get it off the plastic.
What I was saying was that the concept works using black paint to etch, but I only did it on glass which is a whole different beast for getting the paint off.
I don't think anyone in this group has tried paint on plastic - so just try it out yourself - its OK to have failures, I know because I have many, but I keep trying until I find something that works.