I've been Googling all morning, but can't seem to find a good guide to
abrasive blast media. Does anyone know of a good resource?

For example, over at Eastwood they have a lot of different abrasives
to use when blasting
(http://www.eastwoodco.com/jump.jsp?i...rID=243&KICKER)
But I'm not sure which to use and when.

Thanks,

John P.