[Jewelry making - Article 01132] - Re: [Orchid] Rust contamination in fine silver?

[jkbrennan]

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    If your problem is really iron you can remove it with oxalic acid The
    easiest way to find oxalic acid  is to buy some "barkeepers friend or
    bartenders friend" another one is Zud. These can usually be found at
    a supermarket with the abrasive kitchen cleaners  like Comet. If your
    supermarket doesn't  have them a  hardware store may. Just use it
    with water- you won't need to use an abrasive feature. It is used to
    remove rust stains.. Oxalic acid is somewhat toxic so don't eat it.
    It is also found in nature in Rhubarb leaves and Poke (for those from
    the south). Then rinse well in DI or distilled water. 

Good luck
jesse

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