Gentlemen, I realise that this thread is somewhat light hearted and is designed to provoke a smile or two. And generate some comment as it has done. I too would like to add some comment in a slightly more serious vein.
There seems to be a problem here, one of denial perhaps, certainly one of failing to recognise what is the real cause of the rusting evident in the photos shown in the postings on the first page. There is mention of Italian steels and an inference that British steels might also be the culprit.
When I lived and worked in Sheffield in the late 1960’s I was surprised to see them spreading salt on the roads when it snowed. I was utterly astounded to be informed later that something like 8 tons per mile of road were spread on the main roads in South Yorkshire each winter.
What salt that was not picked up by the traffic passing over it was presumably washed off the roads and found its way in the storm water drains, soils and streams alongside the roads. Added to the salts on the roads are the by-products of the air pollution evident in your part of the world which in the past has generated acid rain and you have the perfect recipe for vehicles to rust.
In this part of the world the use of chemicals like salt to remove or suppress snow and ice is absolutely forbidden. Not that we can claim to be innocent of spoiling our environment down here either. The farming practices which we have adopted here have seen a significant rise in the (over?)use of cheap nitrogen based fertilizers and this and other factors have all contributed to the levels of nitrates which have risen alarmingly in the soils and the surface ground waters. It does not however contribute to the rusting of objects like cars.
I can demonstrate that a Triumph made of good/average/ordinary British steel will survive quite happily out in the open air for the best part of 40 years with little evidence of rust. This photo shows a car which I collected recently and which was about to be scrapped.

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It has sat outside in a field for perhaps 20 plus years. The previous owner had intended to repaint the car and had stripped the original paintwork back to bare metal in places. There is superficial rust where the bare metal has been exposed but none of the pitting and disintegration shown in the photos in the previous postings.
But blaming the steels from which these cars were made? I think you are wrong. It is the way we abuse the environment in which we all live which has caused these vehicles to rust in the manner they have.
I will take some more photos of this car in due course for the body is sound and restorable. Yes there is some rust but only where the water was trapped. Perhaps it will lead to a thread on the restoration of one of the very early New Zealand assembled Toledo’s.
Robert