Fairig problem

[GradySailfish]

I don't think this is a temperature issue, as even with those temps the mix should have cured. I think you may have gotten your ratios off and therefore the epoxy won't cure.

Quickfair is great stuff, but expensive. For minor fairing you can't beat Evercoats polyester fairing compounds. I know its not Marine or epoxy but I was turned on to it by one of the best local fiberglass/retoration shops on Long Island. I have no complaints other then a very fast working time in hot weather.

[65Bowrider]

Try putting a heater in the boat to 'warm' things up or try a hair dryer on a section... see if that helps.

[billythekid]

Did you make sure you are using the right pumps? there 2 different sets for the sizes. Mix another small batch without the powder and put it somewhere warm and see if it flashes off.