I just noticed that an area of epoxy in the forward compartment of my boat is STILL a little tacky, 2 days after application. My work area is just about 60 degrees, probably the minimum for epoxy. My other epoxy applications are curing a little slower than I read about, but they DO cure. I'm pretty sure that I didn't make any gross errors in mixing. Will the epoxy eventually cure at lower temperatures? I have just placed an oil-filled radiator a few feet away from the problem area for overnight. How long should I wait before scraping it off and re-doing (the last resort)?