Read an article a few years back in ''American Rifleman'' about what museums used on their guns to prevent rust. The article said that they used carnuba wax. One day when I was using some Kiwi boot polish I looked on the can and the main ingredient in Kiwi is carnuba wax. I've since used it on some of my guns. Rub it on the metal, let it dry awhile and then buff with a dry rag. Puts a nice shine on a blued finish. I use black Kiwi