The current Fairbourne screens are made from Lexan Marguard Polycarbonate I believe. This is a chemical resistant material and is also scratch resistan. My current Fairbourne screen is made from this and is very good. My original, early, Fairbourne screen was made form something else, not so scratch or probably chemical resistant and was replaced FOC. I think the Fairbourne screen is one of the better things you can do to a standard M3W to make it more usable.
