I was asked to make a rifle sling, using some copperhead skin they had tanned. She said it was glycerin tanned. I started by skived down the edges of some 2-3 oz, and tried gluing the skin to it with weldwood. It didn't hold as well as I would have liked. Then I applied a coat of resolene to protect it. Wasn't sure what would work best, but it was a toss up between resolene and saddlelac.
I then sandwiched the skin between two layers of 5 oz. The front was done in dark brown, that looked more reddish, like a medium brown. The back side I oil tanned, cut out the center, adding foam padding and suede.