I would imagine any animal's intestine would make a bow string. Bear gut was used quite often, by the Cherokee, and others. I would think you would have to split it, or turn it inside out, and scrape it clean, and rinse it, or soak it in salt water, and then then cut it to the width, you want, and then tie one end off, to something, and twist it, and tie the other end off, to something, and then let it dry, or put it on your bow, and let it dry., then wax it. That is purely a guess on my part, it is how I would do it, not knowing of any other way. If there is a better way, that is how I would do it then.
But wear rubber gloves, while processing. You might even consider, twisting three pieces, and braid them. Or.......four pieces and do a fold braid. Basically, tie the ends off at one end of the group, and then fold one from the right to the left, and one from the left to the right, and then fold the one facing you towards you, and the one closest to you away from you, and just repeat the process, if done correctly, it will be a square braid. But it takes a lot of material to make long string. You can leave it somewhat loose in the folds, and it will lengthen the string, and make a smaller diameter.
Again, never done anything with guts, except stuff them with sausage, and they were commercial casings already processed. Well hey, you can order those on line!
No nasty smelling coon, to bother with! Well there you go, problem solved. How about that!
Let us know how it works.
Wayne
Wayne