I built my own blaster using a 100lb propane tank a few valves, and then bought the sandblast hose & nozzle from Princess auto supply for around $40 replacement tips come in sizes from 1/8 to 5/8 in and are about $6 each. Found it works great for heavy guage metal ,(frames wheels etc.) BUT it does use a lot of air (5/8 nozzle about 110 cfm) for blasting i'am using a diesel road construction compressor with 200cfm, some rental places rent them as a set and will delever.
