Self-etching primer is ideal for painting metal and creates the foundation needed to bond with the paint. Follow the manufacturer's instructions on the side of the can for best results.

The zinc phosphate is part of a special paint known as a self-etching primer. Cleaning takes soap, elbow grease, and sandpaper. The next step is a long soak in the phosphoric acid. Then you apply ...

However, if they're only lightly rusted, buy self-etching primer instead. It'll prime any bare metal and bite into the old paint around the rest of the wheel. Next, buy spray paint formulated for ...