I don't want this to come across as a complaint, but anyway here goes. About 20 years ago I needed a backstrap/trigger guard on a early 3rd generation Colt SAA re-blued. I sent it to Colt and it came back a plum color. Someone locally tried and it was again plum color. Decided to send it to Turnbull and it came back plum color again. I called Turnbull and was told there was something about the alloy used in the early 3rd gen Colts. You would figure Colt themselves would know what to do. Anyway I asked another local gunsmith (Dewey Vicknair) to rust blue it and it finally was satisfactory. Lost touch with Mr. Vicknair and hope he still in business as this gentleman does absolutely beautiful work.