RE: Fiberglass cloth source?
Any body shop gets 36" roles of fiberglass cloth if you want to purchase it. An other good sourse is an automotive shop, get a friend there and ask them to save the detonated airbags from car wrecks, it is not fiberglass, it is kevlar. I have been using the kevlar cloth from airbags for all kinds of repairs and it works just the same as glassing, but the squares are smaller in it and it covers looking "nearly" smooth.
dan