I like to keep ammunition installed in my western-style cartridge loop belt just so the leather loops will maintain their shape and size (not to mention the eye appeal). Problem is, if the brass-cased rounds are left in there for any length of time, the cases discolor and get pretty ugly looking. I surmise that the acids in the leather are reacting with the .45 caliber brass case. Brass polish and lots of elbow grease will get them bright and shiny again, but I'd rather invest this time elsewhere. Any solutions out there?