Correct, that was the whole intention of dipping, to coat everything inaccessible, the only reason for floor/frame and body holes/plugs as well

I'll stick to sand blasting, as I've seen too many cases of chemical stripping/dipping come back to bite you in the final paint, as far as blasting inaccessible areas, I'll do my best to get into every nook and cranny, if I'm doing a floor or trunk or any other area that opens up frame rails or caverns, I'll blast with that component removed to access those areas, then later a primer acid etchant, epoxy primer sealer or other rust preventive measure to coat inside frame rails or other caverns that will be sealed over with body panels, caps, flooring, etc, etc