I would recommend that you contact Mr. Charlie Wiffler (3M) at (612) 622-5960
with any questions you might have regarding polyester plates. 3M makes
polyester plates (Onyx brand) and if he can't answer your questions he will
tell you who at 3M can answer your questions. I checked with one printer and
they (Bill Merry, Graphics Unlimited, 612/520-2350) said that the 3M plates
work very well for specific applications.