If they are like the Flint steak knives in my rack they are rosewood 
handles.
   I polish rosewood on a buffing wheel and its very pretty.

Have to keep them out of water for long, is the drawback. But then 
soaking wood handles is never welcome.

  Best varnish I have found for kitchen use is marine spar varnish.
Oil varnish and let it cure a long time.
It holds up for years before you have to scrape it off and start over.
   yours scott

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    Scott Grandstaff
    Box 409 Happy Camp, Ca  96039
    scottg@s...
    http://www.snowcrest.net/kitty/sgrandstaff/
    http://www.snowcrest.net/kitty/hpages/index.html