Thanks 00247, I tried to reply to your PM, but something went wrong and now I can’t find it, so I’ll try again here.
I took the top vault door to a well respected auto paint store, that specializes in antique cars and there they matched the paint color that was under a hinge. They took into account some oxydation, and we came up with the color. I don’t know what the base color was, but we chose minimum metallic effect, to try and remain as authentic as possible. Also, against some recommendations, I decided to go with acrylic lacquer, which is more stable as a base for gold leaf and some pinstriping paints. In other words, you can paint enamel over lacquer, but not the other way around. Authenticity was my big thing, down to the original blemishes and imperfections. I really didn’t want it to be too shiny with a modern urathane paint look.