[pianotech] Hardening bass hammers

[David Boyce]

I don't have much experience with using laquer etc to harden hammers, 
and I am looking for advice.

A recent example typifies a situation I've encountered before. A client 
has bought a large good-quality upright, about 80 years old.  The bass 
hammers are rather soft. They are not deeply grooved. I have ironed 
them, but this produced only minimal improvement.

Obviously the proper solution is to fit new hammers.  But where cost is 
a factor, what could I do to harden the existing hammers.

What is needed I think is not to make the surface harder but to make the 
overall texture more dense.  What would be a method to do this at 
minimal cost?

Advice will be most welcome.

Best regards,

David
www.davidboyce.co.uk
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