Limestone is a grainy and absorbent stone that needs care just like travertine. Thorough cleaning with our buffers and truck mounted system followed by proper custom 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. buffing or polishing. This will beautify the limestone while closing up top layer porosity, offering more protection.