I've never tried it, Bart, but know that it wouldn't work for me. Even if I used it for practice only there would be a time when I liked something well enough to frame it. I have a bin of old sandpaper and it's not holding up so well - it's brittle so it's probably not good for the long haul. I also rely on wet underpaintings and don't know if sandpaper would allow them or if it would fall apart.