(a.) That erodes or gradually eats away; tending to erode; corrosive.

ablation ablative abradant abrasion aluminum oxide attrition attritive auto polish buffing burnish burnishing chafe chafing colcothar corundum crocus detrition dressing emery emery board emery paper erasure erosion erosive file filing fretting galling garnet gnawing grazing grinding lawn-roller limation nail file polish polishes polishing pumice pumice stone rasp rasping roller rottenstone rouge rubbing away sandblasting sanding sandpaper scouring scrape scraping scratch scratching scrub scrubbing scuff shining shoe polish silicon carbide silver polish sleeker slicker smooth smoother smoothing wax wear wearing away