I agree with looking for a local powder coater in the Yellow Pages. Have the frame sandblasted/bead blasted before powder coating and make sure that the person doing the sandblasted has experience with bicycles because you can easily go through a tube with aggressive sandblasting.
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Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1