Corbin Bore Cleaner is a cream-colored liquid formulated to polish and lap gun barrels, as well as remove severe fouling and rust. It is available in 4-ounce andpint bottlesoffering a versatile solution for gun maintenance. Used to polish and lap gun barrels while removing severe fouling and rust. Can be applied using lead slug lapping or cloth patch polishing methods. Suitable for both professional and responsible amateur gunsmiths. Can be used for both polishing and lapping, as well as rust removal. New formulation makes it easier to apply than pastes. Capable of salvaging guns that would otherwise need to be re-barreled.