Larry Kraus wrote:

I'm using some highly figured cherry as the top of my daughter's
sideboard. There are a couple small knots which I would like to fill
to smooth the top and avoid collecting dirt. I'm not trying to hide
the knot, just fill it. I recall Norm used epoxy to fill some knots
(in mesquite?) on a project, but I do not think he explained what
epoxy he used or what he used as a coloring agent. As I recall, he
colored his epoxy black, while I'm looking for a dark reddish brown.
Anybody have any experience with this or an alternative method?

I have used sawdust from the wood itself as a coloring agent for
filling epoxy knot fills. It comes out a little darker than the
surrounding wood, but so do natural knots. Just remember to scrape
the surface of the epoxy after it is dry to avoid an artificial
glossy appearance.

HTH

Godzilla