I own a Browning B25 B1 (1970,s gun)with the action finished in a grey metal colour. Despite hardly been used, the action appears to be discoloured in sections or blotches. I get the impression that it had a plastic coating that is peeling off in sections. Is this accurate? If so, how do I remove the rest of the coating to have a uniform shading? Or any other ideas what this could be? My other Browning, a 1960's gun which I use often, does not have the same problem.
Thanks, Charls.