Re: rattle snake
I've used the method bobcat posted above, but did it a little differently. After skinning the snake, I tacked the head end to a board, and fleshed the skin. You would be surprised how much meat/membrane/fat you can get off of a snake skin. After fleshing, I tacked the skin down flat. Once that was done, I used the 50% pure glycerin 50% rubbing alcohol mixture, and painted it on the skin once a day for a week. After that, I let it dry for a couple of days, then fleshed any remaining membrane off, put a final light coat on, and let it dry for a couple of days. Wipe off any excess, and you're good to go. When finished, the skin almost feels like a cross between rubber and leather, and is very pliable.
I think I'm an alright guy, I think I'm alright