72 swinger special

So, I have a bunch of hi temp paint and I was using it to paint some of the stuff under the car. Then I was talking to my neighbor and he said the paint needs to heat cure, and the online instructions agree.
How can I cure the parts, because not many of them are on the engine? Can I use a heat gun, I have a nice one? Or is is better to strip the paint and get what's suggested?