Hey, Denny
I wouldn't powdercoat anything after learning about the long-term results that go with it.
If I was starting from the frame up and thinking about painting the frame, I would use zinc-rich apoxy primer, followed by a top-coat of aliphatic urethane, followed by a good layer of undercoating on everything -- and that sprayed with a professional gun (aerosol spray cans are totally worthless when it comes to undercoat) -- keep rocks and gremlins from getting to the frame itself.