I dont think I'd be buying any of those in a hurry! All that salt water inside the chassis box sections and doors, into the suspension and chassis rails, no thanks! Although a good pressure wash and remedial protection would probably do wonders.

Well I guess heavy rain and driving in heavy rain will wash the surfaces but in the video the cars are having a real hammering off those waves and I can't help thinking that salt water would get into the box sections underneath through the drain holes and openings. I've been underneath many cars and none of them take very well to salt spray after a few years! Particularly the suspension components!

Here in Taiwan, despite the complete lack of road salting, you do get the odd rust bucket, which can be structural in extreme cases.

Surface rusting (in the rare old car) may be down to solar paint erosion and the spectacular levels of air pollution, but the structural cases are probably mostly down to the sustained high pressure salt wash that a coastal car will get in a typhoon, plus the odd beach excursion.

My car was previously owned by a surfer, and has suffered accordingly, Since I took it over, I've slowed the rust right down, so its structurally mostly intact, but the previous owners had done nothing about it, while dealer servicing it by the book.

People are strange..

I’ve seen modern Hyundai’s and Kia’s with terminal rot underneath at 6/7yrs old and Mazda MX5’s you could poke holes in with you finger by the same age. All thanks to the salty sea air and the abundance of road salt used on our roads in winter.

The chap who treated my MX-5 stated he had seen brand new MX-5s with surface corrosion already apparent when they came for treatment.

He said Mazdas were just about the worst for corrosion protection by the manufacturer that he had witnessed.

He could be using a sales pitch but I was already committed to the treatment at that point.