beside the issue of recoating the metal, acid dipping takes away metal - back in the 60, Mopar dipped their drag cars to the point where you could just about punch a hole in the side of their cars in an effort to get every advantage. When there's rust, it even becomes more of a problem since the metal is already thinned due to the metal worm. On a car that never sees anything more than 1/4 of a mile, it's not really a problem. On a 4x4, it really could be a problem...

