Except for extreme use I think the Spar Varnish or a Poly under oil is sufficient for most purposes and a lot easier to deal with than Epoxy. Epoxy can yellow badly and "sugar" up and look white after it ages. Any of the better varnishes for boat bright work can be a good choice. SeaFin Teak Oil is a good one, Epifames is very good, and I have had good results with Cetol. The first two can be mixed with oil for subsequent coats, I don't think Cetol is compatible with oil.

You can just use it as filler by sanding back to bare wood or for more protection leave the last light coat of sealer on the wood surface.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli