Roncallo, I recommend the following steps:

1. Wash car and wheels.
2. Use cleaning clay on all painted surfaces to remove surface contaminants.
3. Polish all painted surfaces with a high quality polish of your choice. Consider using a random orbital polisher if you don't have one yet.
4. Apply a coat of high quality carnauba wax to all painted surfaces, including the wheels.

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Fred Hoelzle