I bought some walnut at an auction and am using to build a large cabinet.
Well, the bargain wasn't all that good cause the wood is distorted and full
of knot holes. There are two that are completely though the piece, and they
have fallen out, so it is just a hole. I can stick them on the side that
goes next to the wall so they will never be seen (except from the inside,
and then not very well), but what do I do with them. I have to fill them
with something. It seems too big for wood filler. Any way to make a walnut
colored filler that will stay put; maybe mixing walnut dust with epoxy? Or
cutting a hole with a hole saw and somehow making a plug to go in? Even
though they won't be seen, I would still like them to be as nice as
possible.

I got the walnut at about 1/3 of retail, but had to do a lot of extra
planing (fortunately it was 5/4) to get down to good wood. I should have
saved it for a project where I could cut around the defects, but misjudged
how bad it was.