The only way to eliminate calculus build up is by brushing and flossing frequently. It takes pyhsical removal of the placque before it calcified into the hard tarter, or calculus. Some people will have more tendency to build up calculus because of the chemical composition of their saliva.
Brasso is a metal polish designed to remove tarnish from brass, copper, chrome and stainless steel. It is available either directly as a liquid or as an impregnated wadding pad.
The main component of brass is copper. The amount of copper varies between 55% and 95% by weight depending on the type of brass and its intended use. Brasses containing a high percentage of copper are made from electrically refined copper that is at least 99.3% pure to minimize the amount of other materials.