bluing tips

so my grandfather has a Kahr K9 that he recently got back from someone he sold it to, and it was returned in less than optimum condition. Seeing as he likes to keep them immaculate, having several small scratches on the finish of a firearm drives him crazy. What do y’all use to maintain or...

Ok to get this section going. This is how you blue gun parts with nitro blue, you can get these instructions off offbrownells Gun Tech Section,or youtube has a very good film as well,You can buy the Salts (stump remover from green light sold in hardware stores), 1.You must polish the metal, very...