Have you all ever done anything to protect your bare brake rotors from corrosion while the car sits - outside - long-term?

I'm looking for advice on actual experiences from having done something to protect the bare iron from corrosion.
Some posts online suggest spraying a thin coating of primer, that the brake pads will easily wear off when the car is used again.
I'd like to know if anyone here has actually dealt with the issue, or discovered anything useful.
Put the car on jack stands, remove the wheels and wrap the brakes in plastic?

BACKGROUND: I've got a buddy with a second home and a car he leaves there, outside, for like 9 months out of the year. He and his family fly there, take a cab from the airport to the property where the car sits. In the past, the issue hasn't been important because the car was 20 years old, just basic transportation, and they'd visit there maybe 5-6 times year, the brakes never got real bad. Now, he needs to replace the old car and he knows he'll be visiting less, maybe just twice a year, so he's looking for ways to sort of protect his investment. Inside storage isn't a realistic option.

PS - I told him to forget buying another car. Just hire a rental when he arrives at the airport.
For the same cost as buying a decent car, he could rent a car for 10 years worth of visits.

Thanks,
- Art