Grease & wax remover first, a couple of times, wiping it dry.
I'd use 220 or 320 dry, then a good wipedown.
Mask the bejeezus out of the interior.
Start with the hard-to-reach areas.

I like to use a color that matches or compliments the interior, like B7 in a blue-interior Mopar for example.
If you have a clear-bra shop near you, some of that on the wear spots helps keep the cage nice.