Jeep 4.0 in 69 Barracuda

That coating gets scraped off the first time the brakes are used but I've found it's pretty resilient otherwise, as long as it's a quality piece. They shouldn't rust unless they have been used but even so I think just a bit of wd-40 every now and then would keep the rust away. Rotors are kind of "expected" to rust anyway.

+1 on that last post just keep the calipers off until the brakes are ready to be used