In all seriousness, what I do when I re-paint my 1/18 scale diecast is bake them in the oven (in my kitchen, and yes, I do have a very understanding wife, thank you). I pre-heat it to about 200 degrees, and then put the car in for about 10-12 minutes, turn off the heat, let it sit for another 10-12 minutes, and then let it cool naturally in ambient room temperature. I do this between coats of primer, as well as coats of finish coat.
One thing to remember, however, you need to have the body off the chassis, and no plastic parts attached. I dissassemble all my re-paints, and paint the plastic parts separate (usually I do not have a finish mis-match between the plastic air-dried parts and the die cast oven-baked ones).
A little experimentation might help, and I have had to restrip and repaint some that I used inferior masking tape on, and tried to bake with it in place. If you are doing two tone paint jobs, I recommend letting the paint air dry first, and then removing all masking tape before baking. I have seen little difference between the two baking methods.
