Waterlox is an excellent choice for Walnut (and most other species as well).
I'm a recent convert to Waterlox and I have to admit it is the best oil type
product I have used yet (I used to mix my own). As far as water resistance,
it holds up just fine. Now I wouldn't go so far as to use it for outdoor
pieces but for most indoor stuff it is the cat's meow.
SH - Or the dog's bark.
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