Glass-beading is a gentler process of surface blasting. It's used on softer metals like aluminum and brass, glass and plastic. It uses softer blasting media like glass beads, plastic beads, walnut shells, corn cob. I guess I missed the description by the seller of the griddle above stating it was bead blasted. Still, to me, it looks like the surface is quite rough. May be just the appearance in the pic.