Why am I concerned about this? Look it's not going to be just those of us who live in areas where salt is applied on the road that will have this issue. We're talking about a safety issue. My mother always held the notion that she didn't care if the car could accelerate...if it can't brake and steer, you're in a deathtrap.
I have had a number of cars over the years, and this is the first one to have brake line failure. Ford changed something to shave weight on the truck to increase MPG. I'll gladly pay for a few extra gallons of gas if I can reliably stop the truck.
Saw where Newmar says they undercoat the motorhome standard. Going to find out what they mean by that and see how they do it and what they use.