Had a friend with a FIAT sedan back in the early 80’s. The TOPS of the door panels rusted though. The bottoms were fine.
That little Fiat two-seater with the engine in the rear....was a bomb. The cooling tubes ran from the radiator in the front, under the seating to the engine. They’d get all rusted and start leaking. It was a bad design and really got some enthusiasts going negative on Fiat for decades.