Wondering if anyone has seen this type of damage to plastic keytops before? I think I've seen it once before on an older piano and didn't think much of it. However, this is a newer Ritmuller grand (a 4 year old GH170). The problem is only on keys in the midrange E3 to B5. The problem is gouges in the plastic and is only present on the "tail" section of the keys, not on the "head". If it was something particular to the owner, I think I'd expect to see the problem over the entire keytop (he assures me he keeps his fingernails well trimmed). Any thoughts on this? Thanks.
Registered Piano Technician
Mitchell Piano Service