The original trim was aluminum with Bright-Dip anodizing. Very few shops will do the Bright-Dip for hobbyists. As always, it depends on how much you want it to look original and how much you want to pay. Some try to polish and then clear coat it. The results are nice, but not original looking IMO. Dennis Barnett Classic Molding Restoration did mine but not sure he still does it. Be prepared for $$ and over a year wait time.