Sandblasting with garnet?

Well I ended up using a product called Nevada Black 30/60 on some parts and it worked amazing! Even with the lil 40lb Harbor Freight sandblaster..it is only $12 for a 100lb bag, only problem is that my air compressor just didn't keep up enough pressure and I did dump quite a bit of sand instead of a constant blast..but it worked, minor pitting (sanded right off) so now I picked up 5 more bags to hit the underside with and I'll post pictures of the before and after as soon as I get to that project.. Thanks for all the advice fellas!