Brian, I have a tap plastic near me too. Go for the matt surface. If they have a dylrin plastic sheet, use that, it won't break. In fact it is a PIA to even file. If they cut it and you have small burs, I have a foredom I can smooth it out for you. The dylrin is what they make the plasctic hammers out of for metalsmithing. I doubt the enlarger is going to break it.