Scotchbrite pad and Comet, oh my goodness.

That's about as harsh as sandblasting them. Please try not to do that again, as you probably removed any clearcoat that *might* have been on them.
Are the wheels chrome? You said that they are, but most chrome wheels are chrome on the inside too.
Anyway, your wheels *should* be clearcoated aluminum but they might not be. Regardless, I would use
Klasse AIO and either Klasse
SG or PB's Wheel Sealant to protect. This goes for both the inside and outside of the wheel.