The metal is rust blued using Mark Lee's Express Blue.
That pistol is stunning. The finish is stellar. Makes me want to dig out the ash pistol stock I have with a 15" .45 cal. barrel already inlet.David
Daryl,With the Express Blue, you heat the metal, swab the solution on, boil it, then card it off. If you don't boil it, it stays brown and will continue to after rust if you don't neutralize it. So, I guess you could call it a hot rust blue.Steve