I work in the industrial scene and I thought I'd pass on an important safety comment.
The dust from a sand blaster (of any kind) is nasty for the body when inhaled.
VERY important to have some kind of vacuum for sucking that stuff up and keeping it out of the air you breathe as much as possible. Even a standard shop "wet/dry" vac will do MUCH better than letting the stuff just drift where it will. The commercial dust systems (some of which really aren't that expensive and can be used for your table saw, etc. too once you get one) do a pretty good job of it, but even a simple shop vac will cut down the amount dust in the air by a HUGE amount. Don't just let the stuff fly.
And in case some are tempted to claim safe experience to the contrary, just because you've done it plenty before and are still alive doesn't mean it's not good for you.
So be good to yo' body and make sure you budget in some kind of vacuum for the dust. I'll throw caution to the wind as much as the next guy, but you really do need to minimize the amount of sandblasting dust you inhale as much as possible.
