The wheels are chrome. I used EO chrome wheel cleaner followed by Protect-All Polish Wax. The week before, I cleaned the tires with EO A2Z and conditioned the tires with Vinylex, a water-based dressing, to soak into and condition the rubber. This week, I used Endurance. I like to start with a water-based dressing every once in a while to preserve the rubber. That Protect-All stuff works really well and is almost a fast as QD. I've used Z5 over SSR1 on several cars and it's a great combo. After the SSR1, I like to wipe down the panel with some QEW or S&W to remove any residue and hit it with a spritz of Z6 just to prepare the surface for the Z5. I guess an ultimate purist would go SSR1, full Z7 wash, Z6 and Z5, but it just takes too much time for the extra wash/dry and I haven't noticed any problems doing it my way.