Raw aluminum surfaces will naturally develop dulling and clouding just from the moisture and pollutants in the environment. That's why most people recommend that you do not remove protective finishes like paint and anodizing from aluminum by polishing. Once you polish out the clear or colored anodizing or paint, you will need to do "maintenance polishing of the aluminum part for for the life of it. Moisture will just accelerate the process of corrosion. you might even experience a condition where the often touched portion of the lever will stay fairly birght and clear from frictional wear from you hands, while the untouched portions of the lever will cloud up and possibly develop further corrosion.

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