How to Restore a Clear Anodized Aluminum Door

Anodizing is an electrolytic passivation process that creates a hard protective layer over the surface of aluminum. This thickened layer is quite porous and makes the aluminum more receptive to dying. Clear anodized aluminum is not dyed and, consequently, shows signs of aging less readily. But, over time, an anodized door may succumb to the elements and become stained, corroded or faded. To restore the door, you must clean it and provide a protective finish to prevent further corrosion.

Water
Liquid detergent soap
Microfiber cloth
Sponge
Neoprene gloves
Denatured alcohol
Aluminum clear coat
Foam brush or roller

Instructions

- 1
  Mix 1 tablespoon of liquid detergent soap per quart of water. If the anodized aluminum is simply dull, clean with a microfiber cloth. If there is pitting or rust, clean with an abrasive sponge. Do not use steel wool.
- 2
  Rinse the surface of the anodized aluminum with fresh water and a clean non-abrasive sponge. Allow it to dry for one hour.
- 3
  Put on a pair of neoprene gloves.
- 4
  Moisten a cloth with denatured alcohol and wipe down the surface of the anodized aluminum.
- 5
  Apply the protective coating with a lint-free cloth or high-density foam brush or roller. One coat is usually sufficient to protect the clear anodized aluminum from fading and corrosion. Only apply a second coat if directed to by the label's instructions.

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