: Heh. I expect outdoor temp to be constantly around 0 deg Fahrenheit
: during the time I work (evenings) for 3-4 weeks of the project.
: So if I can work in 40 degrees in a garage, I'll be pretty
: happy.

: I worried more about temp variations using space heaters since I
: hear about how relative temp differences around the hull can
: cause blush or bubbles or explosions or radioactivity.

Um....3 to 4 weeks? Well you're at least optomistic :)

Actually the heaters I was thinking of look much like built in baseboard heaters but are portable, somewhat more expensive than the cheap heaters you normally find, they'll also keep a small room fairly comfortable and will regulate the heat pretty well. I've had two times I've used these heaters to heat smallish garage like structures and both times they would easily maintain normal room temperatures. But you have to not set them back much when you're not there, it takes a really long time to warm the space the first time, much easier to maintain the temperature.

Bill H.