It sounds like the damage is to an area with champagne, that particular color is tough to find, I had to get it from Melody directly. It’s an interference paint, but its not the gold.
Base coat in black, then layer on the appropriate interference color of either blue or purple, then lay on the champagne. Without an airbrush, I would use a dry brush technique, and make sure it is fully dry between applications.
You might need to request some champagne paint from Melody.
Good luck.
Kyrin