Powder coating absolutely flakes right off when you use Permatex Gasket Remover. The Permatex part number is 80646 (NAPA part number is 765-1230), and it comes in a 12 oz can. You can strip a frame with one can and there is NO SCRAPING! WOOHOO!
Only works on powder coating. Don't waste your time with a painted frame. For that I like Jasco or Blitz strippers for big tough jobs, but only if Citristrip fails to work. Jasco will eat the meat from your bones. Wear gloves and a mask.
Two coats of paint applied and another two to go, then I'll rub it out with compound and add my stickers. It looks great and I'm excited.