I have done that exact same thing with some of mine. I had some skins laying around for a long time, which gave opportunity for the bugs and mice to get a hold of it and destroy. I took the bug eaten skin and cut geometric shapes like lightning bolt pattern, diamond, etc. and used it for decoration up and down the limb symetrically. This wouldn't work too well if you was trying to hide sinew or some other backing, but that looks really cool if you don't have enough skin to finish one out.