I sprayed my OLD bow and my NEW coffer with perfect results. So the repellent works on the glazed leather as well as the older bow leather. I doubt that the glazed leather on the new bows would react any differently since it's the same leather as my coffer. I've pretty much tried the repellent on most types of leather even exotics. The only leather I don't dare to spray on is buffalo and deerskin. If in doubt, always test! BTW, I do think that the glazed leather seems tougher than the older bow leather although it is distressed.