My take on the matter is, yes…we want to answer the original question…basically… a batch of gel-coat is on the boat and it’s not setting up…where does one go from here…?

But just as important is how to avoid the problem again in the future…such as making sure there is wax additive in the resin, mixing the two parts thoroughly (not just a couple quick stokes around the bucked with the stir stick), mixing in one bucket and pouring it into/working out of another bucket, doing a small test batch if you are unsure of the correct resin/catalyst ratios for the temperature you are working in, avoid working in direct sunlight if at all possible, adding any fillers or thinners to the resin only after the resin and catalyst have been thoroughly mixed, and being aware of the fact that there are many types of fillers, if you put a filler in the mix which is easy to sand, it is also not going to stay on the bottom of your boat as long as one which is difficult to sand.

Bob