Intuit: You don't have to rough up the surface. I wipe it down with alcohol to make sure there's no dirt or grease on the limb, then size it with a thin coat of titebond, which I apply with a foam brush. After that has dried for a day or so, I wet the skins, brush titebond to the back of the skins and press them onto the limbs. After that dries a day or so, I trim the skins to the limb edges with a sanding block, remove any remaining scales and spray with 3-5 light coats of polyurathane. Hand rubbing Birchwood Casey gunstock finish also works but leaves a shinier finish. I've done it this way on a half-dozen or more bows so far and haven't had a skin loosen yet.