Howards Copper and Brass Polish is works fast and is easy to use. It cleans and polishes copper, brass, bronze and stainless steal, restoring your cane to a beautiful shine . Pine-Ola's special blend slows tarnishing without the use of strong acids or harsh abrasives. The Pine-Ola brand has been the choice of leading silversmiths across the United States and Europe for over 90 years.