Are the discolored tabs ones that would have been used a lot, like tibias, pressed manually just about every time the organ was played? If so, the color may be due to frequent touching/handling...many people play with dirty hands...many people's skin exudes sweat and other substances that will discolor some materials. Are the white keys similarly discolored? Conversely, if the discolored tabs are ones that were seldom used, infrequently handled, they may have aged like ivory without benefit of the polishing constant handling would otherwise provide. In any event, you might try a very mild bleach solution on ONE tab...if it works and doesn't eat the tab or make the discoloration worse, have at it. Noel Heinze, Asheville, NC St. Giles' Chapel, Deerfield Episcopal Retirement Community Rodgers 835 & PR300S --------------------------------------------------------------------------------- To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgers.html