The .45 colt defender that I enrolled in Bearcoat finishing school had a truly nasty looking dummy mark. The gun is stainless, so of course the mark really showed up. When I talked to the guy at Bearcoat he assured me that the mark "would go away and never show up again". So far he's right. There's no sign that the scratch was ever there, and no sign of it in the new finish. I realize that it's only been a short while, and I don't know that it will never come back, but so far so good. I LOVE Bearcoat!! Gene