my take based on painting 2 frames:
overall you would be better off getting it powder coated by a places that routinely powder coats bikes....over all cheaper/more durable
if you really have a in with a car painter use that as car paint is much more durable than "rattle can"
If you do it your self....get a good mask first thing like $40
general steps that I used
100% no paint left on frame
wiped with paint prep so there are no oils on frame (handle with glove on after this)
coat of acid etch primer
coat of sandable primer
light sand
wipe with tack rag
2-4 coats color (thin, best to plan to do re-coats in the re-coat time period specified by the paint)
2-3 coats clear
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Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)