It's a chemical reaction between mutton tallow (the substance infused into the felt which was the lubricant of the day) and brass. Best to replace. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of KeyKat88 at aol.com Sent: Tuesday, September 15, 2009 6:47 AM To: pianotech at ptg.org Subject: [pianotech] Steinway verdigris questions Greetings, Is Steinway verdigris mold? Is it better to repin or replace wippens in a Steinway that has this? Thanks Julia Gottshall Reading, PA _____ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090915/199ef59b/attachment.htm>
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