Correct colors, 1968 Plym Barracuda wiper motor

I have taken the wiper motor off to repaint the firewall. The wiper motor has a flat section that attaches to studs and a round can shaped section that appears to have been "gold(?)" in color. I went on line and found several for sale but they are black and look more like a blower than a windshield motor. I found some on ebay that look like mine that are $275 (nos) so I'd like to keep mine if it works. If I was to paint the can shaped part, what color would I use for both parts? Thanks.
Author: inspector71