Ah ha! There was a post several weeks back, from a guy whose end pour got water in it, as it had been in a bucket of water. I was wondering at the time why on Earth it had been in a bucket of water. Strange, though, that none of the instructions or builder logs that I've seen for Pygmy and CLC boats have mentioned the potential heat problem.

: It sure can cause problems - I've had it "boil" the epoxy, giving
: off some very nasty fumes and creating a kinda 'honeycomb' end pour. Two
: things that can help: Do several small pours - the less volume, the less
: heat it will generate.

: Cool the area. I've had good luck wrapping the bow or stern tightly with
: plastic, and then standing it in a bucket of ice. Let it chill well, then
: do the pour. Let it cure before removing the boat from the bucket...