Proper Blasting Media?

[highspeeddirt]

Was wondering what ya'll would consider the proper blasting media for say something like an aluminum intake?  Should you change different medias if you were gonna do some harder metals like wheels, or is there a recommendation for "all around" use?

[4Cruizn]

Here is a link that might help. 


http://www.usol.com/~cindyfarmer/