Just install them and a couple of times a year wipe on or spray on some Boeshield T9. That will keep any corrosion away. Spraying actual clearcoat might result in fitment issues since they’re so tight fitting as-is and basically zero tolerance for adding more thickness.
T9 won’t change the look of the part, it’s not a permanent coating and can be removed with a solvent based cleaner if you choose. I would spray the entire face of the wheel while you’re at it. I don’t know how often you wash or detail your car and wheels but stuff takes zero effort to spray on and it’s dry to the touch the following day.
Think of it like waxing your car a few times a year except this stuff has real rust protection.