DOH! I found the curing times in the System 3 catalog, which I had put aside without reading. In fact, there's also a manual on how to use the stuff, which was bundled with the unread catalog. Says not to use the stuff I got under 55 degrees, with 60 to 77 deg. being the easiest range to work in. I *had* read the S&G kit instructions which included suggested temp. range (60 to 90) but did not have the estimated cure times for those temps.

Everything is all set up...plastic drop cloth on the floor, panels assembled at the butt joints, wax paper under the joints, weights on either side of all the joints (a few of the panels are slightly warped), appropriate lengths of FG tape cut and at hand, thermometer and oil radiator in place...OK, I can no longer put off stinking up that room!