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  1. #1

    Aluminum Pitting

    Has any one had experience using phosphoric acid to clean pitting on aluminum surfaces such as hard top or tower piping?

  2. #2
    Platinum Member Charter Member
    My Boats:
    Join Date
    Jan 2001
    so. WI
    Go to your local quality paint store and pick up DuPont etch- it goes by the product name Alumiprep 33. They make the alodine for protecting after etching and rinsing the etching solution- Alumiprep 1201 (1200 is clear)
    Good stuff and carries a mil-spec.

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