Powder-coating the frame is a good idea for most anything, I haven't done it myself, we do it to gov't equipment here in the plant. Looks very good.
Eastman has a home kit, but your problem would be in finding an oven big enough to stick the long bows into for baking. If you decide to go this route, buy a used oven for the garage, it does leave an odor inside the oven. I don't think your home partner would like the new scent in the kitchen oven.
Sometimes a plating shop does coating, as does strippers, look in the phone book.