Sorry for you mate.Time must fly by up here, my container was new about 10 years ago and it certainly has more than 1mm of rust in places
Granted it is right by the sea and is constantly getting covered in spray and also often waves when the weather is a bit stormy.
I presume you'd have to chip off the loose scale & measure the thickness to verify there quote, & I can't remember if they quoted on an inland locations or not.alledgedly CORTEN was a British development yet somehow the yanks own the patent.