Danko: I think I am with you on the oil treatment of inner surfaces.
The body metal on an SSR is suppsoedly double sided galvanized, but:
1. What about the places where that galvanzed surface is broken by bolt and screw holes and welding?
2. What about all the NON-"body parts"?
In 1978, right after buying a Lincoln Town Car brand new, I actually hooked up a setup that used an air compressor and a pesiticide spray can filled with oil, and sprayed all the inner surfaces of that car using a technique like you described. I went with a very genrous amount of oil. It did drip for a few days.
I drove that car in Ontario, Canada and Minneapolis, MN winters for 6 years and put over 75,000 miles on the car, and not even a trace of rust anywhere. When I traded it in 1984, it had the Canadian odometer calibrated in kilometers verus miles, so had "rolled over" past the 100,000 km = 62,000 miles, and registered about 20,000 KILOMETERS on the odometer. The dealer's trade-in evaluator, not noting the calibration in KM, actually thought it had opnly 20,000 MILES on it until I told him that it was actually 75,000 miles. he was very impressed. I got a really good trade in price.
Jim G