the giant exposure table that i have to share with 70+/- other budding artists and printmakers has innumerable scratches, gashes, streakes, stains and marks.. frosted mylar has stopped diffusing out said blemishes and im both puzzled and extremely frustrated as all of my photo emul. work shows giant lines and blow-outs in the stencils i create.. no good!!
can any of you seasoned pros offer some advice?
would be much appreciated