ID sandblasting sand

I joined the list in the middle of a discussion about using autobody
sandblasting sand for substrate.

Can anyone give me more specific information? I called around yesterday and
was told autobody shops use a variety of sands. Is there a grading I should
ask for, or a name? Thank you.

Greg. Tong
San Francisco, CA, USA
gtong at sirius_com

"Every infinity is composed of only two halves."