Re: Source for Fiberglass supplies near Chicago??
I live in Chicago, but I have never bought anything locally. Not sure which suburban area you live in, but I personally think the best deals are online, even with the cost of shipping. I've personally bought epoxy resin and cloth from fiberglasssite.com and the stuff is pretty good, though the resin does blush. They also sell polyester resin. It usually comes in a few days after ordering.
Why polyester and what do you plan to use it for?