Here is what I did:
First I tried to do it with One Shot enamel and my squirrel hair pinstriping brush. That did not work. I found a can of red spray craft paint that worked with metal and applied light coats.
Then I hit it with my head gun and sprayed it again. I put on four coats. My Bigsby cut out left a lot of black around he letters so I shot some of the spray paint into a plastic cup and then got my pinstriping brush out and painted around the Bigsby logo until it was pretty perfect. I'm excited that it came out so nice.