Re: fiberglass mat
I bought fiberglass woven cloth at home depot for about $5.00 for a 3'x 3' piece. It worked just fine on a couple of new stringers I needed to glass. They also carry a polyester resin made by Bondo for about $31.00 a Gal. But I went with West Systems epoxy resin. And as far as the fiberglass goes, I think the woven cloth is easier to work with, and in my opinion, seems stronger.