It's stainless steel right? So that means a cold blue from Blue Wonder won't work, and I'll have to get it hot blued from a smith to get rid of the nicks and scratches? Not that mines have any yet, but just hypothetically, in the far future. I know there are people who wants to keep the nicks on their guns, but I guess I'm not one of those people. Does the hot blue have to be Black Melonite 68HRc exactly?