Dear Allan, Regarding your problem with cleaning "Ivorite", there was a problem with the formula used for the earlier versions of "Ivorite". Fortunately, Yamaha believes strongly in the philosophy of being responsible when new ideas are less than satisfactory. Please contact Greg Frank at Yamaha and he will schedule a technician to come and replace the keys with new ones (we don't just replace the keytops, we replace the whole keyboard). This is the ONLY solution to the discoloring of these keys. Sanding, cleaning, and/or polishing is only a temporary solution. Greg can be reached at: 800-854-1569. Take care and enjoy a new keyboard, and our apology for any inconvenience!! Brian De Tar "NO OBSTACLES...ONLY OPPORTUNITIES" Yamaha Service Consultant BDeTar@aol.com
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