The lower specific density with the material makes it suitable in applications where weight requirements are critical. Only retain adding new coarser grit, and because the media breaks down, it will create a "working blend" of assorted sized particles. This allows for effective surface cleaning/polishing. SiC is harder than aluminum https://campusrecruitment48269.wikipowell.com/5630787/3_physical_properties_of_silicon_carbide_secrets