I feel that I'm a better person for having stood right next to it.
In the picture you chose, it looks like it's ready for a touch-up. Probably with steel wool.
Before the vinyl I'd go with Real Aluminum Plastidip S. It would cost 1/10th as much.
http://www.dipyourcar.com/forums/showthread.php?19089-September-Airbrushed-Alfa-Romeo-GTV
http://www.dipyourcar.com/forums/showthread.php?11253-Rusted-Wheels-Faux-Patina&highlight=rust
If you want real bare metal:
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