High Partials

[Jerry Lambuth]

Dear List,

I do a lot of work on old uprights, and have a recurring problem with new
dampers
leaking high partials - usually the 5 th or 6th - when the offending note
or another 
harmonically related note is struck.

Should I replace the damper (different size?, location?), try to needle out
the offending partial?

Any input will be much appreciated.

Also anybody have a good solution to clean cat urine off the pinblock,
agraffes, etc?
I'm replacing the bass stgs. They're badly corroded ( blue green!)

Thanks.