I did the experiement using "TurtleWax POLISHING COMPOUND". I just happened to have a can sitting around. I used a damp cotton cloth and rubbed real hard on the body behind the right rear wheel. Results: No paint color on the cloth. Only some grey oxidized glaze! It's hard to believe, but if you guys are right, this is not the original paint. The test experiment area doesn't look any different than before the experiment.
Any other clues that would tell me the paint is not original?
Thanks for your help!