How to frost acrylic?
I'm making a project in which I will need to frost the acrylic (3mm plexiglass) and since frost paint or frosted acrylic is not available around here where I live I will have to use sandpaper. Last time I tried frosting acrylic (6mm plexiglass) with sandpaper (which was 180 or 280) I kinda succeeded, it was frosted ...... until I dropped water on it. What I was left with was lightly sanded acrylic with lots of scratches so I was wondering if anyone could tell me which sandpaper should I use and how should I do it.
Thanks in advance :)