For maintenance cleaning we recommend Professional APC Plus. With proper dilution, it is one of our most versatile products--safe for paint, metal, upholstery, carpets, wheels, and engines. If it’s been a while since your wheels were properly cleaned, you can use a diluted solution of Diamond Professional APC Plus reduced between 4:1 and 2:1. for the initial cleaning. (Before you start cleaning, be sure to test wheels on the back or in an inconspicuous spot for chemical compatibility.) After the initial cleaning, increase the dilution for maintenance cleaning. To help protect and restore original pliability to all vinyl and rubber surfaces, use Diamond S Dressing which leaves a long lasting, just-detailed appearance. This kit includes: Professional APC Plus, Diamond S Dressing, 1 sprayer, 1 multi-purpose brush, 1 terry applicator sponge, and 2 microfiber towels.