I was thinking about the various "hot boxes" people build to dry their turning wood, when it occurred to me I had a better heater then a light bulb already

I use one of http://www.campingworld.com/browse/s...74/skunum=2594these to keep the RV dry in the winter, and it should work well. It's basically a small (100watt ish) heater, with a fan

These are also available at Boating supply places (I got mine at West Marine, for less $$$$)