Will the acid damage the metal?
The acid we use will not damage your sheetmetal parts. We use phosphoric acid that's been used for decades to treat rusted surfaces for paint. Another misconception from the internet or somewhere. Let me state it again: the acid WILL NOT damage your sheetmetal panels, parts, bodies, or cabs. There are a few types of metals that the acid will damage: cast parts, spring metals, & pot metal. We can still clean cast parts and spring parts like seat springs. However, most of the cleaning on these types of metal items is done in the hot tank. Cast parts and spring material parts get only a very light acid treatment to ensure no damage is done to them.

Shell ONLY - you're close to 3 G's by the time you add doors, fenders, trunk lid, hood, etc.

Ive always been intrigued by acid dipping a uni body. Ideally, it would attack all the spots on the body that are hard to get to by any other method. But, if the car was anything but but solid with only surface rust, wouldn't an acid dip cause some of the more heavily rusted areas on a typical older car to basically disappear? Basically, is acid dipping only a process that safely works for cars that are already in pretty good condition (metal wise)?

I've always been intrigued by acid dipping a uni body. Ideally, it would attack all the spots on the body that are hard to get to by any other method. But, if the car was anything but but solid with only surface rust, wouldn't an acid dip cause some of the more heavily rusted areas on a typical older car to basically disappear? Basically, is acid dipping only a process that safely works for cars that are already in pretty good condition (metal wise)?

MOST places (and there aren't many to begin with) don't do an e-coat. The big difference being the business model - dippers are in business to remove coatings, e-coaters are in business to apply them. I only found one (in Vancouver, Canada) that offers a zinc coating after stripping.