Yep Jack, whatever they use is truly corrosive! I discussed it some at the CT Fest and it seems to be a horror show for big trucks and the trucks spread the stuff. Every metal brake line has been replaced. I had the one between the fuel tank and frame let go on Christmas Eve in the driveway when I was picking up a Cub...
That was the only line that had not been replaced. The Cub is 'Rudolph' the red long-stripe. All the stainless lines (fuel) looked perfect, as was the top portion of the fuel tank (I was warned, but the guy that did works for a fleet place that has mostly Chevys)
My little 2004 Malibu isn't bad, but the truck is usually what sees the highways in the winter.
The biggest problem is the spray chlorides (?) stick like crazy and not too easy to flush off.
What ever happened to Ziebart?? I think they should have a good market now considering even the OEM corrosion can't seem to hold up to the new stuff.