Blasting media

[Fred n' Ethel]

Hi Folks.
A basic search didn't help me much.
I have a blast cabinet and one of the import blast pots.
Quite a selection of media out there. Black Diamond, glass beads, sand, soda, ......... and ...
Questions:
What do you typically use, and where ?

Frame, heavy metal components ?
Under body, floor pans, etc.
Outer body panels, the pretty parts.

I have seen mentioned that careful techniques produce great results with minimal/no warpage. Any tips regarding specific procedures ?

Thanks very much,
Fred