Quick54: It is all "sized" and will not clog up as bad as the stuff from Lowes or the local hardward store as theirs is not sized...at least around here it isn't.
Just sift it through a metal window screen. That's how I do it because there isn't anywhere close by to get sized sand. There's a Home Depot or Lowes in every town so just get Sacrete General Purpose Sand in the white bag. It's dry, cheap, readily available and sifting is fast and easy.
Get a large tarp and you'll be surprised how much you can catch. I blast on the carport and lose about 15-20% which isn't much, IMO.
Oh yea, Get a GOOD respirator or risk serious health issues.