Figured I would add to this.
Sub 50 dollar Sand Blaster
Basically you need a few parts, an old propane tank, a welder, and access to the plumbing section at your local hardware store.
This is the basic design, you need these parts
and here is the finished product
If anyone is interested I can give you the breakdown on parts, but its pretty simple to figure out what you need.
Its a pressure pot blaster, basically you pressurize the tank with the media in it and blow air around the tank through the pipes, then the pressurized tank forces abrasive into the air stream regulated by the valve.
Works absolutely like a champ with black diamond media from TSC. (7.99 for 50lbs its WAAAY cheaper than my soda blaster)
I would guess it uses about 18 CFM at 100psi, as my compressor will shut off while using it, but it runs more often than not.