I use glass beads in mine. I bought the cabinet from Tractor Supply. It leaks everywhere and the lid doesn't seal so I use masking tape on the joints. I blast a lot of carburetors so the glass beads work great. For rusty cast parts, slag will be OK. I removed the cheap-o outlet filter on mine and use vacuum cleaner bags over a piece of pipe welded to a flange. The flange just bolts in were the original filter was. It works really good at catching beads and dust.
Joe
