Michael,

Firstly, dont put ANYTHING on the bone tops.  I 
used a couple of coats of Minwax Antique Oil 
Finish 
(https://www.finewoodworking.com/2014/12/04/antique-oil-finish) 
and put more on every five years or so, when it 
looks like it needs cheering up.

David

At 18:42 14-07-18, Michael Dunn wrote:
 >
 >Yay, my ZHI Hubert clavichord kit arrived a week ago (Hi Ed!), and
 >I’ve been busy collecting materials, studying the manual, etc.
 >
 >The manual specifies tung oil to finish the keyboard (ebony/bone), and
 >I am curious of others’ opinions on keyboard finishing in general.
 >And assuming I use tung, pure or polymerized?
 >
 >thanks
 >Michael

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