I degrease it well, normally brake cleaner, gun scrubber, carb cleaner, etc. Then a rub down with 90% alcohol. paint brush to clean lint.
If it's a small part, I can preheat in the oven and cure it there as well.
A heat gun works extremely well for preheating and keeping it hot for a bit. I use the no bake Aluma-Hyde II, but some heat works good with it.
A buddy made an oven with heat lamps for those big parts --and no stink in the house. You could probably use a section 10-12" vent pipe with heat lamps for curing?
In the summer(not much up there) you can hang in the attic for faster curing if using the AH II.
Unless you want the duracoat or baking laquer, the spray cans from Brownell's works fine. The big thing with those is preheating the part and can, the paint seems to flow so much better. I found that a sink of super hot water works great for the can.--and shake the piss out of it.
Hopefully this helps!
Mark