If you tan them with glycerin they won't work as good for gluing down on a bow. All you have to do is skin it, scrape what meat that is still on it, off, and tack or staple it to a piece of cardboard or wood till it dries.
When you put it on a bow, just hydrate it to make it soft, I rub TB on the bow and lay the skin down and smooth out all the bubbles. Then wrap it lightly with an Ace bandage until it is dry.