The Best sandpaper for difficult metals such as iron or metal is aluminum oxide, although the most beneficial sandpaper for softer metals for instance aluminum or brass is silicon carbide. Back again to previous website Shut If there is anything at all inside your cart, it won't be brought over https://www.quora.com/profile/Trevor-Flatcher-2/Exploration-of-Silicon-Carbide-Application-in-Friction-Materials-https-iflatiron-com-exploration-of-silicon-carbide-a