Fiber/sanding discs for cleaing ,polishing metal ,wood , stone etc surface to remove rust,paint.corrosion, welding , polishing. Fiber / ... Sanding disc for cleaning ,polishing metal ,wood , stone etc. surface to remove rust, paint, corrosion ,welding in Material ... , P36,P40, P80,P100, P120 Fiber/sanding disc with depressed center