Any scratch white in color implies a deep scratch that cannot be buffed out using our standard A substance used to sand, scour, scrub, smooth or polish by removal of the original material. The amount of material removed is determined by the size of the abrasive particles used (ie: grit) Sandpaper, scouring powders and steel wool are examples of abrasives. procedure. Heavy grits, such as a diamond disc, would be needed to remove enough stone layers to even out the scratch. Replacement of the affected stone is often the best option.