Re: where is the cheepest
Ditto the US Composites. It's all there. Fillers, chemicals, gelcoat, tools, glass. Helpful people. The guy I dealt with is Mark. I bought everything from them, except the roving. I bought that from fiberglasssite.com. Just a fuzz cheaper. They ship bulk glass in rolls, not folded up in a wad like some yahoos.
Auto parts store resin is just as good as anybody else's. Lowe's carries Elmer's brand polyester resin. I'm using both. Bondo brand poly resin from Advance Auto, and Elmers from Lowe's. Total gallon count will probably be 6 to 8, including side boxes. Unless you want to pay the shipping, resin is the easiest thing to find of all. The itty-bitty squares of glass cloth from an Auto Parts store or Lowe's are useless unless it's a small patch. Good luck. KR