piano is both a musical instrument and a piece of furniture, which
is why you should treat its finish as you would any other wooden
surface: keep it clean, don’t put beverages or other liquids
over it, and avoid scratching it.
may want to clean it every once in while, using either
a dry or a slightly damp cloth. You may want to dust
it from time to time, as well.
frequent polishing is not recommended, an occasional
polish for the older pianos can be done using a good quality product.
Make sure to ask your piano tuner-technician
about either how to do it or whom to call.
more information on the subject, refer to The
PTG technical bulletin on finish care.