Cellulose is explosive, literally. If an open flame touches a keytop the entire set of keys will flash burn, charring everything around it, including the keytops, making them very difficult to recover. I would replace the set ASAP. Using dark stain you can stain the white tops to match the old color. There is a product available from the supply houses for this purpose, look in the area of the key materials. Please remember that cellulose is next of kin to gun powder. Have a happy new year. Newton nhunt@rci.rutgers.edu
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