Do it Yourself Paint Drying Box

The first thing you will need is a heat gun.  Cheap ones are Ok.  You don't want to get one to high powered that will melt your model.  

Next you need to get you a nice sized box to use.  Cut a hole in one side to shoot the hot air through.  Make yourself a baffle for inside to box so the air stream isn't blowing directly on your mode.   Only run the heat gun for 2 or 3 minutes at a time.  You want to get the air in the box up to temp, but not so high as it messes up your model.  

I use this method for drying subassembly's mostly.  I never use it to dry my final paintjob or the clearcoat until its dryish to the touch.  This way no dirt particles that get blown into the box will stick to the final paint.   

The main thing is to not get impatient and mess up your model.