When I etch into clear acrylic, I normally flip the image horizontally for a mirror image. Then, I etch in one side so when I flip it and look at it from the smooth side, it looks normal. The etching is white (see picture for example).
What would happen if I did this on frosted acrylic? Would I be able to see my image from the smooth, unetched side of the acrylic? Would the etching be whiter than the “frost” on the acrylic? Can someone show me something they did on frosted acrylic?
You can even flood the engrave with acrylic solvent (it evaporates quickly) and get the engraved surface back to glossy.
Testing is the fun for me, and testing is the best way to achieve your vision. A treasure hunt! That gives great value to scrap material.