Greetings All, Black shoe dye works very well, can be obtained from you local shoe repair shop. Apply liberally and allow to soak in for 24hrs, then buff with 0000 steel wool. Does a great job of of cleaning up the key sticks so the finger nail scratches don't show. Fast cheap and simple. Regards Roger Roger Jolly Balwin Yamaha Piano Centres. Saskatoon/Regina. Canada.
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