Believe it or not, sandpaper goes a long way toward getting rid of those "hairs" on the back of a rough-finish leather belt. I'm talking a good-quality, one piece of real-deal cowhide belt, not that press-bonded leather scrap crap. If you take a piece of 150grit sandpaper and use gentle pressure with a quick motion, you can literally rub off the little hairs sticking off the belt and smooth the surface for a decent rough strop. Still, it's going to be NOWHERE near the finish of a legitimate, high quality strop, but it will get you moving in the right direction at least. It could also work for you whenever you get ready to paste for a refresh.