18.15.36 - Mark
You can see how some places are cut deeper than others. I've seen some people suggest that you pass a blow torch over cut plexiglas to make it clear, but I don't have a blowtorch and a lighter isn't hot enough. Thickness of my bit aside I think this has a lot of potential (more so if I buy a couple more bits).
Like I said in my other engraving post, I don't have a lot of ideas for it - yet. I know there's a lot of potential tho'