Ive always stuck with tried and true MP paints. (always look for 2-3 cans with the same batch number)

Prep: pretty much like everyone else
1. go over with a clean paint brush and some paint thinner.
2. put some alcohol (painting type) in a small spray bottle and hose as much as you possibly can on.
3. spray with low psi air nozzle to get access off
4. after the fumes disperse go over with a heat gun to remove any condensation that may be left
5. paint, i usually start off with a few VERY thin coats to get a good base, let it dry and put on about 1-2 more thick coats depending on coverage



END RESULT: dads buddies always comment on how nice the paint always stays and says it has to be sprayed out of a gun