It’s probably a reasonable guess that most of us don’t give a lot of thought to how we fold sandpaper. I picked up this technique many years ago and it does seem to make a sheet of sandpaper last longer. I don’t believe keeping the sanded sides of the paper from grinding against each other is as important as using the paper systematically by following a folding pattern.
Vertical corner planter. Great for any small space! Wish: A special collaboration to support the Make-A-Wish Foundation