This is an old trick I learned from my dad when I was a boy. For some scientific reason the manufacturers of shotgun cleaning kits provide copper wire brushes and bore cleaners. This has always seemed to clean the gun well.
A Rusty Situation
As I’ve mentioned before I hunt waterfowl a lot. Typically my gun gets wet and sometimes can show rust even before I get back to the vehicle. If you have a gun with bluing on it you can manage small rust spots by spraying a small amount of Nitro Solvent and using the thin edge of a shiny copper penny to gently rub it away. Works every time. Give it a try.
Post comments if you have a good idea for cleaning the rust off of your prized possession.