Just found this topic...
Bought a 2014 truck with 39k on it from new mexico in March ..... Has never seen snow or salt , frame looked flawless.
Brought the truck back to Michigan (home of salt and shit roads) had it professionally fluid filmed immediately when I arrived in Michigan.
I have noticed the fluid film has attacked the factory undercoating and it will actually wipe off with my finger , leaving bare metal under it .
I hope to not drive the truck in the winter , but I am concerned about rusting while the truck sits outside in my driveway during the winter months .