What I've done is used 'aircraft paint remover' to get the paint of, then used rustoleum rattle can primer, then rustoleom paint- for the same reasons as you- when they need touching up I can do it with the rattle can.
On the other side of things, I think that with powdercoating they wouldn't need touching up so much cause its a more durable coating.
'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi
| 
