Terry I would plug the hole with a wooden dowel cutting the dowel just a tiny bit shorter then the depth of the hole and use some loc-tite 420 to glue that into place.The 420 will fix the splinter as well.As for covering the hole you can mixed a two part epoxy with brown dry artist pigment and get a pretty good color match.Then cap the hole over with that or maybe add some type of a thin overlay over the hole.bowdoc