I agree with Charley. I had this conversation last week with a body shop owner/friend doing his 50 original Buick. His concern with dipping was that it could open up rust issues down the road by not being able to prep/seal concealed areas where the sun won't shine. He opted to chemically strip the car after removing all the panels, bumpers ,stainless and glass. I have heard good results with the Walnut shell blasting also.