Looking to sandblast my sliders, it has a couple coats of por15 and a couple coats of spray paint on it. I've used that black beauty coal slag for blasting them before but it's dusty stuff to work with. Has anybody had any experience with the glass beads or aluminum oxide blasting media? Locally(to me)they go for about 5 times the cost of the black beauty coal slag, just wondering if the glass beads or aluminum oxide stuff takes off the paint any easyer/faster with less mess.