I had my 72 Barracuda dipped at Redi-Strip in Tempe AZ. Cost for the body, doors, hood,front fenders was $1100.00 It removed all the rust, undercoating everything down to bare metal. Reveal some rust issues that I had not seen before. I had it dipped about 5 years ago I sprayed a etch primer on it when I got it home. It is ready for paint now. The trunk , engine compartment , interior underneath have all been painted for a year.
I would do it again.