Since it warmed up to a balmy 30 degrees today I got to work in the shop for a while. We recently had a thread about condensation. Today I came up with an idea that worked.
Since I have little use these days for a hair dryer, I took it to the shop with me. Cranked up the heater, but I also put some localized heat right on the saw top, and a few other cast iron pieces. It eliminated the forming of condensation, plus it added 1200 watts of heat for the 10 minutes that I ran it.