media blasting

[kb426]

I have areas on the 32 cab that I need to blast. One of the companies that is 4 hours away said I should try black beauty or 150 grit aluminum oxide. Does anybody have any exp. with either of these or know how much air pressure to use with a siphon pot?

[enjenjo]

I've used both, For rusty metal, I prefer the Black beauty. Of course I was given 1000 lbs of aluminum oxide, so that is what I am using now

Most of those type blasters are rated at 90 psi.