I have used Mark and he did a fine job on a butt extension. I have a gouge I would like to fill and blend as a DIY repair. I have a good friend that does some excellent oil paintings and thought I might give the repair a shot.
I used Buck Hamlin on a few horribly broken stocks and was amazed how they were invisible when done.

Possibly a light fill with epoxy and the Shellac sticks may be the way to go.