I have an old S&W Model 19 from 1966 the bluing is worn off right around the cylinder release. There is a small amount if surface rust but I take it off with Nevr-Dull. Corrosion is not the issue. Is there a refinishing service that can duplicate the original bluing of a 1960's S&W? I ask because Smith can't, the quality of finish and depth of bluing on their new revolvers is not even close to mine. They must have changed the process or formula or just lost the skill. Know any gunsmiths can refinish an old one so it is exact?