5 Techniques To Lift, Remove & Erase Dry Watercolor Paint
Sandpaper is rarely used because of it’s destructive nature. Tiny sharp shards of sand or other abrasives rip layer after layer of paint and paper away with each stroke.
Sandpaper, when it IS used, is best used as a final touch for subtle textured highlighting.
If you try to paint over a sanded area, your paint will suck into the holes of raw paper fiber like a blotter.