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  1. #1
    Join Date
    Aug 2009
    Posts
    17

    Default Cleaing Water Stains from outside painted wall

    I have outside painted wall that have some water stains caused by drips coming down always in the same path.
    What should I use to clean the stains? I do not want to repaint yet.

  2. #2
    Join Date
    Aug 2007
    Location
    Portland, Oregon, formerly of Chicago
    Posts
    1,780

    Default Re: Cleaing Water Stains from outside painted wall

    I am assuming that the stains are brownish iron stains. I would try CLR, which is available at any homeowners store. A diluted solution of oxylic acid will also remove iron stains. Oxylic acid is the main ingredient in most deck brighteners. I would try either solution in an inconspicuous spot first, to make sure that it doesn't fade the paint color too.

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