We recommend that all inca, nickel and chrome finishes are cleaned as follows: 
After use rinse clean and dry with a soft cloth. Do not use cream or chemical cleaners. By following this procedure, limescale should not form, any problems of this nature, however, should be referred to the suppliers.
We also supply fittings in natural polished brass. This is not lacquered or electroplated and will tarnish naturally. To maintain the polished finish metal polish should be used.