Chrome plating is a hard and durable finish that requires little attention except for the occasional washing with soap and water.
Salt air or other corrosive atmospheres have a destructive effect on chrome. Where chromium-plated fittings are exposed to these agents, it is important to wash them frequently. After they are washed and dried, it is advisable to apply a protective coating such as ordinary furniture wax.
Green spots may appear on chromium plating. If this happens, prevent the rust from spreading by scouring the spots with the same kind of powder which manufacturers recommend for enameled, cast iron fixtures. When the spots have been removed, apply a film of wax. Your plumber will be glad to help you select a good cleanser.