there's a place local to me that will sandblast and powder coat bike frames for like $80, forks included. you need to strip EVERYthing off the frame, including the headset, bottom bracket. I did my old cruiser that way years ago and it came out great. I've also done rattle can jobs, the hard part is prep, sanding the old paint off sucks with all the curves and crannies and stuff, and a wire brush didn't work very well either, but once sanded down, a light coat of rattle can metal primer, and two coats of Krylon in color of choice, and it looked decent enough..

this...


went through this...



and became this...



which turned out to be too small of a frame for me, hahahahaah, so I sold it to a college girl who was 5'0...