How should I care for my piano's finish?
As with any piece of fine furniture, never set objects on your piano without a soft cloth or felt pad and never place plants or drinks on a piano – spills and condensation can cause damage. Locate the piano in a room with a fairly even temperature, away from drafts, dampness, and heat sources. Never place your piano in direct sunlight – it can age the finish prematurely, cause color fading and cause the piano’s tuning to fluctuate wildly.
New piano finishes generally require only occasional cleaning with either a dry or damp cotton cloth. Use the feather duster first to get most of the dust – dust can put tiny scratches on the finish. If there is a need to clean the piano or keys try a cloth dampened with a dab of mild dish soap or diluted window cleaner. Don't spray anywhere near the piano since overspray can cause damage inside the piano.
Older lacquer piano finishes may benefit from an occasional polishing with a good quality polish, but frequent polishing is not recommended. Never polish a "satin" finish.
High-polish polyester finishes (German and Japanese Pianos) need only be kept clean to maintain their gloss. I repair chips, dents and scratches that occur in polyester finishes.