Machined, or machine polished, wheels are etched with a state-of-the-art, computerized lathe and then clearcoated for protection. This process etches tiny lines (like the grooves on a CD) into the surface of the metal and gives the wheels a very shiny appearance. Wheels may be machined on the full face of the wheel, or painted and machined only on certain areas like the lip and spokes for a bold, two-tone look.
During the chrome-plating process, several layers of metal (may be a combination of nickel, zinc, or copper) are applied to a polished wheel, which is then finished with a layer of chromium and polished again. Chrome wheels can truly transform the look of your vehicle with their brilliant, mirror-like shine. Chrome wheels are very durable if maintained properly with regular cleaning and waxing, but they aren't recommended for winter use in locations with extreme weather, since the salt used on snowy roads can damage the chrome finish and pit the wheel surface.
Painted black wheels are spray-painted with automotive-style paint and are available in several finishes, including satin black, semi-gloss black, carbon black, stealth black, matte black, and flat black.