Wishing won't make it happen, slim that Bess down ( I like to use a small scrub plane, or a scraper), relieve the cheek area so you can shoot it, and learn all those skills. This gun is a bare canvass waiting for you to paint a picture of a Committee of Safety musket that saw the birth of a nation. Remember, in aging guns, less is more. Too much gooped on "patina", or too many dents, and dings, make it look phony. You'll find a scotch bright pad used to scrub back the finish, and patina, will become your best friend. Also a small field repair of some sort often makes the aging more believable. Good Luck.
Hungry Horse