The gold was a wrap, a vynil decal over the whole door to give it the correct color and image. This was a common practice then, and now. I reimaged a few pumps myself when I was working on the modern stuff about 10 years ago with vynil wraps. I wanted to stop this off for a repaint. I started with the hose guards, and was surprised to find green underneath. I was a bit confused, what would be green?, I thought. Later a simple google search, I was reminded that Amoco was green in the 50s