If you are interested in repairing, or maybe even building, objects made of fiberglass, TAP Plastics has a good selection of epoxy resins, gel coat, fiberglass fabrics and polyester resins.
They also have free instructional videos.
You could use their products to repair cars, boats, kayaks, canoes, ATV's, RV's, surfboards, shower stalls, tubs, etc.
One of the challenges of a do-it-yourselfer used to be finding materials that professionals use; not so much of a problem these days with the advent of the internet.
I suspect one of the reasons you can't buy some of these materials at Lowes or Home Depot is they can be very toxic if used incorrectly. I've used fiberglass repair materials outside various times, and epoxy for many small repairs, without wearing any protection, but I repaired a fiberglass shower stall a couple of weeks ago and realized how nasty the fumes and dust are in an enclosed space.
If you are using a fiberglass type resin be sure and have adequate ventilation and wear proper breathing protection. The fumes, and the dust from sanding, are not something you want to inhale. Epoxy may be a better choice for some repairs and doesn't have anywhere near the fumes, although you still have the dust to deal with when sanding.
SWEET COMPOSITES - Tools & Equipment has a respirator, gloves and various other tools for anyone wanting to work with epoxy or fiberglass.
These are some other links I found useful in learning about fiberglass or epoxy repair.
Fiberglass Repair pictures from kayaking photos on webshots
BoatUS BoatTECH Guides: Fiberglass Repair
Fiberglass Repair: TAP Plastics
