Rust on brake rotor "hat"?

[x33rs]

On the newer cars back when we had them, since the brakes were so visible with the modern style wheels, I was simply using aftermarket zinc coated rotors. Lasted and still looked like new for years while we daily drove the cars. It kept the vented portion of the rotors looking nice as well.

That's what I would do, wait for brake job time and just replace them with zinc coated. Most of those factory rotors don't have enough meat to turn them anyway.