Aluminum is a highly versatile material that is used to make many things, from cooking pans to bicycle wheels. Unfortunately, aluminum has the tendency to oxidize over time, meaning that the material accumulates a chalky, grey cast. Once you start to see this oxidation form, there are a number of ways to remove it. Begin by cleaning and scrubbing the aluminum to remove any debris from the surface. Then clean the aluminum with acidic cleaners and scrub to eliminate the oxidation.