To make a nice sanding pad that has several (4) surfaces...

I take a sheet of sandpaper. You can make this sheet any size. Fold in half with a good crease. Now fold in half 90 degrees from your first fold so you wind up with 4 "quarters" in you sheet. Now tear or cut along one of your folds to the center of the sheet. Fold this flap in first and follow by folding the rest of the sheet so you wind up with a nice pad 1/4 the size of your original. By unfolding and refolding you will get two new sanding surfaces.

The sanding surface will only touch the back of the sandpaper so no dulling will occur. You always have some sand to help you fingers to grip the pad. You can use a whole sheet of paper or a piece an inch square. Ya I've done the 1 inch thing, but don't recommend it

Ken