I've seen first hand the effect of glass 80 grit on steel. It's no different than steel beads, or small particle
style sand. Nothing slippery about it, just a smoother satin finish. Aluminum oxide leaves a rough almost cast finish, which if you're using professional filler primer, then it will hide it just fine. When I get mine back from the shop, I plan to use 400 on the steel, then rust killer, then primer followed by paint. I also stripped my Shogun with chemical stripper. Nothing dripped out and the paint still looks fine 2 months later.,,,,BD