The most common cause of sticky keys on vintage Steinway pianos is Verdigris on the centerpinning, or pivot points of the action components. For many years, Steinway dipped their action parts in a paraffin oil to act as a preservative for the wood. The result is a chemical reaction with the center pins and felts on the parts, causing Verdigris corrosion (see picture). There is no permanent cure for Verdigris. The parts must be replaced to correct this situation.


Satisfied customers are saying