I just finished painting a 55 Ford F100. I have a kerosene blast heater also. I fire that thing up and get the shop between 60 and 70 degrees. Shut it off and shoot a coat of paint. I vent the shop and fire up the heater again. Works for me. We've had temps down in the 40's here lately. No that I got all the painting done, the temp got up to 65 to day.

Frank

No better smell than that of fresh paint. I've been building and painting cars/trucks for 47 years. Not gonna stop now.
http://www.coxcustomcars.com/