Bluing and Barrels
Factory-original bluing is a uniform color on all metal surfaces, but when a gun has been reblued even by a professional gun shop, you can often notice mismatched colors on various parts. Also, gun-shop metal polishing prior to rebluing frequently blurs and rounds the edges of the name, model and serial-number markings. Stock refinishing is usually detectable, even when done by an expert, and is unmistakable when done by an amateur. When there is evidence of refinishing, your "why" alarm should sound. All things considered, I feel more secure buying a shotgun in need of refinishing than one that has already been refinished. Refinishing does not necessarily add to the value of a used gun, and may reduce its value.