Lee - I've had great luck with 5 minute epoxy on walnut and oak. Ends up
looking fairly natural and seems to take a poly somewhat so probably will
take the tung oil as well. two coats is enough, then sand - works REALLY
well with big defects. (try a on test piece and see if it gives you the look
your after)

Good luck - Schroeder

"Lee" wrote in message
t...
Have some very small gaps in joined wood I would like to fill. (Yeah I
know
I need a new joiner) What should I use for a filler?
Wood is walnut and the finish will be tung oil ( no Stain)
Looked at Behlen wood-fil ( water base)and it seems to be the right
choice.
If I'm right where can I get some. Catalogs and Woodcrafter don't mention
it.
Is there an alternative brand and should I use water or solvent base?
Thanks in advance
Lee