When is it good to Sand/ Media blast your car?

We just went through this. Rust (heavy stuff), cut out. Uther light rust, Harbor Freight discs. Then ospho. Then etching primer, and 2 stage primer, then build primer, then block sand. The painter loved it.
i saw a couple of pics of the charger you guys did. that thing was a mess.you guys did a phenomenal job of rebuilding that car:thumblef: you hang out over at FBBO sometimes, dont ya?