I agree with IC.......you will need a big nozzle blaster and a good 2 stage 80 gal. compressor and if you have never sand blasted with sand, you need to know some stuff. Things like not warping the panels is the main thing. Most guys use soda blasting nowadays. It only removes the paint and light rust but will not remove heavy oxidation. You also have to remove the residue that is left after soda blasting.
You might be better off using a good paint stripper and a wire wheel you can attach to a disc grinder.