Four Foot by Six Foot Sandpaper Eraser
I was working on a door and some swirl marks came through on the stain. That meant sanding back through the stain. Of course, that meant I was going to load down sheets and disks of paper just holding the sander within a few feet of the door. What a pain in the neck, and the pocket book.
For some reason, while I was bending over to get something, it occurred to me to run the sander against the horse mat covering the floor. It sure wasn't going to hurt anything. After running it a few seconds, quite a bit of oily sawdust appeared on the floor. When I looked at the paper, ALL the stain that had loaded the sandpaper was gone.
Cleaning the paper by running it against the [four by six foot] horse mat every few minutes, when it started loosing its effectiveness, allowed me to do as much with one sheet as I would have done with ten.
The reason I have what you want is, I never lent it out before.
Scraps are a myth.