In 2001, on my way to Carlisle, I dropped off my '65 Sport Fury's hood, fenders, inner fenders, core support, doors, and deck lid at Central Indiana Redi Strip. Six days later I picked up the parts as they came out of the tanks. All of the parts were immersion stripped in a caustic solution (pH 12, IIRC) which removed the paint and any bondo; and the parts were electrified which removed any rust. As the parts came out of the immersion tank, they were thoroughly rinsed and then dipped in a phosphate solution which prevented any rust (at least in our dry Colorado climate).
I recommend this process, but if your car's body has extensive rust, they will warn you of the outcome before they start. http://www.redistripindy.com/
My Sport Fury is a convertible, I had the body blasted a shop in Colorado Springs that uses crushed garnet (about 200 grit), the sheet metal had a frosted glass like texture.