I’m making some path/accent lights to light up a dark area for an event. The main body is plywood, but the front (where the light comes out) is acrylic. I’ve experimented with insets (thank you YawString), but decided I liked the frosted look that engraving acrylic gave me.
One tip I figured out. Don’t engrave acrylic at 75 lpi! The engraving itself is fine, but weeding the tape is a nightmare because it leaves little strips of tape/glue between what the laser burns away. 125 lpi or higher (the attached photo was engraved at 500 zooms, 80 pews and 225 lpi.