Want to sandblast -Need Guidance

[dumbell2]

Well after talking with MPrimo and doing a bit of digging around on the internet. I rushed out and bought this:

http://www.harborfreight.com/40-lb-c...net-93608.html


I didn't buy any blast media, because they did not have what I was looking for in stock. I want to buy the following:

100/170 glass bead; and
90-120 granite blast media.