You can temporarily free them up with engine starter fluid, but it won't be a permanent solution. ("Like mildew, it will return.") Has anyone ever figured out what the exact chemical reaction is between the bushing felt additives and the center pin plating, or exactly what verdigris is, chemically? --David Nereson, RPT Hello list: I am rebushing a set of Steinway hammer flanges that have significant green / black verdigris. Hammers had 1/2 to two swings on the typical swing test. My question is about the flange / birdseye. Is there a good way to flush the birdseye to get the verdigris out, and what solution would one use ?? Thanks..... I'll contingue my bushing and wait for a reply. Dave McKibben
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