There was a similar thread about testing engraving on jewelry, that I lost but wanted
to in-put that Quality One Engravers in Rancho Cucamonga has a great product we
use. It is a green translucent tape in 2" width that you can apply to the surface of
items and using a very light pressure, test engrave either burnish or diamond drag
engraving. I think it was around $40. a roll, but lasted us about 2 1/2 years with 2
engravers using it. Sometimes I've reused it if it had some unused areas. We also
use it as a mask or surface guard on metal or plastic plates and always when rotary
engraving on acrylic or any highly polished surface using a nose cone to control depth.
When deep cutting thick brass or engravers brass to depths of up to .05, requiring
multiple passes, we've re-applied new tape after every couple of passes it it does
start to peel. I've never had a failure or nose cone shadow as long as I paid close
attention to it. "Try it, You'll Like it." Ward Stenson : Never too old to learn