to dull a platform edge so as to strengthen it in preparation for billet or pressure flaking Go here to read an article that contains information on abrading The piece of grinding wheel or stone that is used for abrading is called an "abrader "
To abrade something means to scrape or wear down its surface by rubbing it. My skin was abraded and very tender. to rub something so hard that the surface becomes damaged (abradere, from ab- + radere )