Greetings, This is my first post, and probably won`t be my last. yesterday, I traded for a Savage 330, 20 ga. It is mechanically perfect, but the factory bluing is missing in spots, and there is a little pitting under the forearm. What I want to know is were these shotguns rust blued or hot blued. The solder at the end of the barrels, seems to be soft, which leans me toward rust bluing. The color on the barrels is more black than blue. I have Mark Lee rust blue solution, but don`t know if that would be {right}. I`m also looking for a take down, gunsmithing guide. What do you gentlemen suggest? Thank You..........Art.