The lower panel areas that have rust are at the bottom of the front fender support panels between the radiator and front fender. It is only in the area where they were bolted and touching the front splash pan. I believe these areas can be sanded to clean metal or at least very close. I will use the navel jelly as you suggest.
The other area is the rusty and rough frame and suspension componets and I suppose most areas under the car. Sanding here will remove the loose rust and grime but the deeper pits would have to be ground out and I couldn't do that.
Another area is the brake drums.
Tim
