Use the sand blaster at Sears think [box] to smooth, roughen, or decontaminate surfaces with a high pressure stream of abrasives.

Both Allsource and Harbor Freight have similar sand blasters for removing things like paint and rust. Here are the differences between the two.

Harbor Freight sells everything from heavy-duty blaster cabinets to complete portable blaster kits, and even various types of abrasive material and safety gear.