I own a relatively new, Asian make, baby grand piano. Its formerly black glossy surface now has plenty of scratches and small dents, mainly, I have to admit, due to my young children playing on and around it. Is there anything I can do restore the surface of the piano?
Scratches and dents are two separate and quite distinct problems. The dents in your polyester finish will be the hardest to repair invisibly; these will inevitably require a repair followed by a re-spray of the entire panel, particularly difficult on most Asian pianos as the polyester is usually quite thin. Scratches, if not too deep, can be masked with some degree of success using a black car polish (Colour Magic or the like). Simply apply a very small amount with a soft cloth and buff off with another. Good, old fashioned pink Windowlene will remove small scratches and built up dirt leaving a good shiny finish – try on an inconspicuous corner before launching into a full on assault. For a showroom finish the only course would be to re-spray the whole piano at a cost of £1500 – £2000.