I have a sand blaster I bought from a garage sale. Its a gravity feed Craftsmen, pistol grip with trigger, 5gallon tank, and it has some course grain white sand in it. I was blasting away today at about 65-70 PSI and it was dooing pretty good, up'd to 80 and of course it works better and uses about twice the sand. Does anyone else use a sand blaster? what PSI you run them at? I am definatly buying a blasting box of some sort soon!