Optimum Ferrex, Iron Fallout Remover - 1 gal.

Directions for wheels:

Avoid using on hot surfaces. Wash wheels to remove excess contaminants.
Spray Optimum FerreX™ directly on wheels and allow 1 – 2 minutes to fully dissolve ferrous oxides.
Agitate with a soft bristle brush as needed.
Rinse off with plenty of water.

Directions for painted surfaces:

Wash with Optimum No Rinse™ Wash & Shine or Optimum Car Wash before applying Optimum FerreX™.
Use on a cool surface and out of direct sunlight. Spray Optimum FerreX™ directly on painted surface and allow 1 – 2 minutes to fully dissolve ferrous oxide. Agitate with a microfiber towel or soft sponge if necessary.
Rinse off with plenty of water.