I've two suggestions for you, both are the exact same just different colours:
1. Prep them and spray them silver, then lacquer over them with clear enamel paint.
2. Prep them and spray them satin black, then lacquer over them with clear enamel paint.
Personally satin black is my choice, I've tried the silver on my current car and it just doesn't stay clean, I'll be going back to black next tyre rotation.