For everyone with a cheap sand blast cabinet that has a plexiglass window that is totally frosted over,try this.....clean the window with a plexiglass cleaner then spray with acrylic clear enamel. It comes back like new. I tried this this morning at work on a piece of Lexan,cleaned it first then I scuffed it up with emerycloth until it was totally scratched up then sprayed it with clear paint.
Not sure yet which paints will attack the plastic,but I will give mine a try this weekend. Will post pics of results

SteveSr