I have 1987 Dungeons and Dragons pinball machine it has Mylar on the playfield. The Mylar was definitely added by the op and not factory. You can tell by the middle top Pop bumper as the Mylar is touching the bottom of one of them which could be used as a starting point. Anyway the Mylar has a small crack in it and also on the inserts you can see bubbles of possibly it is adhesive showing from underneath it. Is it worth the risk of damaging the playfield by attempting to take off the Mylar with freeze spray? Or just not worry about the imperfections of the Mylar? Pretty much asking for opinions on what you would do.. I can try and take pics of it if that'll help.