Sandblasting media

just got one of these http://www.grizzly.com/products/Industrial-Blast-Cabinet/G0714 looking for suggestions for a good media for steel parts off our plasma cutter. Want to smooth edges, remove slag / dross and prep for paint or powder coat. Our big box store sell this https://www.menards.com/main/building-materials/concrete-cement-masonry/bagged-concrete-cement-mortar/black-blast-blasting-sand/p-1444445322601.htm

That’s probably the closest you’ll get to doing what you want. Don’t expect it to do any noticeable smoothing of edges, though. Or even do much to slag.