Talking about rust, generally speaking not much of an issue in these parts. As example, have an 01 Tacoma which in northern climes many have been bought out by Toyota because of frame rust. Here, no problems with the frame.
Put the least expensive front AAP Wearever rotors on it a few years ago now. There's what I would describe a very light area of surface rust in the central portion of rotor, the part that pad doesn't hit. Nothing remarkable.
Looking at the AC Delco Pro on RA/Amazon, I see now they have a recessed area where the coated hub portion meets the pad surface. Don't know if that eliminates the portion of the rotor the pad might not hit. More expensive than the Wagners. The ACDelco OE which seem to imply overall rust proofed coating more than the ACD Pro.
Considering that I was looking at lower tier rotors, some non coated, these should be ok.