rust on the hubs in the rear

I drove the vehicle off the lot with rear hub rust on sides. Went to 2 dealerships and emailed Ford corporate and nothing was done. Stated was just "surface rust", but isn't that how "real" rust starts. Looked at the 2017 Escapes and they are the same way. I don't know why these can't be simply painted or treated. This isn't on the other higher or lower end vehicles on the lot. First brand new car that I have purchased in 35 years and this is what you get!