Not sure from here ,looks pretty rough,I would sand it with some 60/80 grit and see how it turns out,that will clean it up,looks moldy.
![Smiley :)](http://www.primitivearcher.com/smf/Smileys/default/smiley.gif)
Then you can use it to back a bow or any other project you would like. Raw hide is great stuff and very useful.
![Smiley :)](http://www.primitivearcher.com/smf/Smileys/default/smiley.gif)
Pappy