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  1. #1
    Join Date
    Mar 2009
    Posts
    66

    Unhappy Cast Aluminum Standing Mailbox

    I have painted this box twice now.The problem is the aluminum starts I guess you would call oxidation beneath the paint and makes a fine white powder.Does anyone have a solution for some sort of primer coating to prevent the problem so the paint will not peel.Thank You
    Last edited by tggringo; 02-23-2011 at 09:47 PM. Reason: Forgot to say Thanks

  2. #2
    Join Date
    Aug 2007
    Location
    Portland, Oregon, formerly of Chicago
    Posts
    1,580

    Default Re: Cast Aluminum Standing Mailbox

    tggringo,

    Aluminum does not accept paint without some preparation. You can etch it with acid or you can get a self-etching primer.

  3. #3
    Join Date
    Mar 2009
    Posts
    66

    Default Re: Cast Aluminum Standing Mailbox

    Thank You Sir.

  4. #4
    Join Date
    Oct 2012
    Posts
    1

    Default Re: Cast Aluminum Standing Mailbox

    Itís really great to know the information about self-etching primer, but I think you should know about the quantity of solution you have to add while painting.

  5. #5
    Join Date
    May 2010
    Posts
    47

    Default Re: Cast Aluminum Standing Mailbox

    i don't know if this applies to aluminum,but it works for galvanized metal.
    wipe the surface with white vinegar, then wipe down with water or denatured alcohol & let dry. the vinegar is a mild acid & will etch the metal.
    i got this tip from a professional painter friend & never had a problem.

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