Thanks for the info. A followup question in regards to amine blush, when people talk about washing their fiberglass, what does this mean? Also, what humidity level is considered too high to be doing epoxy work? I have what is called a non-blushing formulation, but I want to be on the safe side. Again, thanks for the help.

Check the manufacturer info on humidity. I've never had a problem with epoxy curing in high humidity, but it may depend on the brand. The worst experience I had with amine blush (BTW, I don't know why they call it blush, because I can never see it- it's usually a 'greasy' surface film...) was in hot humid weather (90% humidity, 90 deg F), but the epoxy definitely cured.