Lacquer is probably the toughest gun stock finish you can find and relatively easy to put on. Get a couple rattle cans of satin finish Lacquer at your local Home Depot and put it on with several light coats until you have the coverage you want. Let it dry a few days and go hunting.
Of course, prep is important as in all finishes. Either strip the existing finish down to wood or sand it down to a good, flat surface.

Bob


Never underestimate your ability to overestimate your ability.