the glass etching cream is actually pretty weak stuff- you can get it on your fingers and it doesn't do anything...
I made the mask with my vinyl plotter- the cream doesn't affect the vinyl at all- just etches the glass around it. It's actually pretty easy to do (a heckuva lot easier than the 24 champagne glasses I hand-engraved for a buddy's wedding lol)
thanks for the good words everyone:)
I think maybe I'll try doing a few other designs...get a whole mopar fleet in the cupboard:-D