Soda Blasting wiki For the types of uses Denny mentioned I can see the benefits... I still have 'issues' with the idea of Soda Blasting for preparing metal for paint.
I don't see where it saves any time or money since after something is 'stripped' it still needs the 'protective layer' removed and neutralized and the surface scratched for adhesion quality if you're going to use an epoxy primer. Not to mention the rust still present.
If you look on the link it has a list of paint manufacturers and their warranty policies and recommendations regarding Soda Blasting.
Not very comforting.
