Since the thread has morphed...... My wife had a mid-1980s alfa spyder. Top leaked and red carpet dye ran. Warranty replacement carpet also ran. If you needed wipers on "intermittent", you just honked the horn. Electronic cam timing device cut the cam loose at least once. Automatic seat belts got out of phase, moving forward on the doortop track when you got in, but going back to full "belted in" position when you got out. Much more that I can't remember, but, back to the original topic, we had no rust problems.
Bob