Bill, I don't see why the horse hide wouldn't work fine for lining. You've got it right, it's been my experience that sweat will wreck an unlined skirting headstall pretty quick, if it's being used hard. By that, I mean being used every day by someone making their living horseback, which is the situation that most of what I make is subjected to. Rocks,...well, in the case of the Flint Hills here, rocks are a good thing. The hills are primarily limestone, with flint on top. That situation is what has preserved the last 2% of the native tallgrass prairie in the world right here. It's why this is great grass ranch country , as opposed to being farmerville. JW