Timothy: Maybe I can help you out on this project. Without removing the
body from the frame, you can't do a good job of restoring the frame. The
part of the frame that goes bad is the part that you can't get to. That
is the top side where all the dirt and water lie. But if you are wanting
to do something for the frame and not remove the body, this is what I
suggest. Somehow you have got to get under the car with a power washer.
If you have a place with a lift (wouldn't that be a nice Christmas gift)
you can do a good job of cleaning the bottom and the sides of the frame.
You may be able to reach some of the top. Without a lift, you're
screwed.
After the frame is cleaned, you will still have some spots that will
need wire brushed. You may fine spots that need repaired (welding). When
you have it all inspected and repaired and you're satisfied it is clean
and dry, paint on a product called 395A. It is a metal preserver. Highly
resistant to salt, acids, and alkali under moisture or water. It is
brushed on and dries to a gloss black finish. It is made by Ensign
Products, Cleveland Ohio. Comes in a gallon can. This stuff is really
good. I've used it for years and no rust has ever appeared once it is
applied. Drying time is four hours. You should be able to purchase it at
any body shop supplier or places that sell auto paints. After you finish
don't attempt to clean the brush, just throw it away. 395A will not
paint on if the temperature is cold. This is a summertime job (or a hot
garage).
There now you have preserved the exposed parts of the frame and it will
look good. But what about the topside, and the parts you can't get to?
You'll never know until you do a "frame off". Good luck.
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