Chemically etch (frost) acrylic (plexiglass)?
I scoured the web looking for a simple way to etch acrylic plates and glasses, the way I etch glass plates and glasses using a stencil and etching cream. Could not find anything. Then it hit me - acetone!
Well, I tried applying it the same way I would etching cream and made a big mess.
So what I needed was more control. Instead of straight acetone, I took nail polish remover (with 98% acetone) and a cotton round. I dabbed a little nail polish remover on the cotton, then folded it over on itself to soak up extra. Finally, after applying the stencil, I dabbed the cotton onto the acrylic, rinsed to get any extra off the stencil, and removed the stencil. It came out beautifully, looking exactly like etched glass! (The photo is my test piece, the mess is on the opposite side of the logo shown.)