The best thing you can do is move to Arizona or Nevada (maybe New Mexico).
In all seriousness, this will only slow down the corrosion process. Every time you touch the bare metal, the sweat on your hands will stay on the metal and will eventually cause a hand shaped corrosion spot.
I really admire those that have bare metal aircraft and can keep them looking nice. Too much work for me, especially here on the Texas gulf coast.
Karl