Hey Now, I know I'm a bit late on this thread, flitz will also work very well on key tops. Not sure how it would work on marker pen but it is not harmful to the plastic. I have used it many times. If you read the label it can be used on any plexiglass, fiberglass. I figure plastic key top material is not too far from plexiglass. It works!! Steve Blasyak Oragne county Chapter -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100407/3902349f/attachment.htm>
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