Can the wear shown by the yellow arrow be repaired or'touched up'?
I certainly don't want the gun refinished - just a cosmetic repair to the little area. It's not deep - just seems to have occured because of the missing crane detent and the cylinder moving back and forth.
Birchwood Casey makes a sharpie that is filled with cold blue. It works pretty good for small spots. You may have to give several coats. I apply, let it dry some then rub it out with a soft rag = Then repeat as necessary.