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Rust stains on gold coins.

keetskeets Posts: 25,351 ✭✭✭✭✭
in U.S. Coin Forum
Is there an effective way to remove rust stains/spots from gold coins?? Thanks in advance.

Al H.

Comments

  • BAJJERFANBAJJERFAN Posts: 31,276 ✭✭✭✭✭
    You can try ascorbic acid aka vitamin C or there is one caller Rover which is a mixture of I believe sodium sulfite and sodium hydrosulfite. Use the Rover outdoors as it is sort of noxious stuff, gives off SO2 sulfur dioxide. Stinky sodium thioglycolate works too. The drift is to convert the iron in rust from the ferric state Fe3+ to the ferrous state Fe2+ which renders it soluble in water.
    theknowitalltroll;
  • Billet7Billet7 Posts: 4,923 ✭✭✭
    Never done it before...maybe CLR or LimeAway, possibly Hydrogen Peroxide. I don't think acetone will do anything. I don't think these chemicals will react with the gold in a negative way, but best to get a second opinion.
  • Billet7Billet7 Posts: 4,923 ✭✭✭


    << <i>You can try ascorbic acid aka vitamin C or there is one caller Rover which is a mixture of I believe sodium sulfite and sodium hydrosulfite. Use the Rover outdoors as it is sort of noxious stuff, gives off SO2 sulfur dioxide. Stinky sodium thioglycolate works too. >>




    Wow...breaking out the "Big Guns" early I see....image
  • Billet7Billet7 Posts: 4,923 ✭✭✭
    I also hear vinegar, lime juice, baking soda or potato juice can work as well.
  • ModCrewmanModCrewman Posts: 4,041 ✭✭✭✭✭
    I have been successful with Rust Remover on silver...can't speak to it's effectiveness on gold.
  • derrybderryb Posts: 37,620 ✭✭✭✭✭
    Are you sure it's not copper spotting. I don't believe there is any metal in gold coins that should rust.

    No Way Out: Stimulus and Money Printing Are the Only Path Left

  • pmacpmac Posts: 3,189 ✭✭✭


    << <i>You can try ascorbic acid aka vitamin C or there is one caller Rover which is a mixture of I believe sodium sulfite and sodium hydrosulfite. Use the Rover outdoors as it is sort of noxious stuff, gives off SO2 sulfur dioxide. Stinky sodium thioglycolate works too. >>


    And maybe have some of your silver around to do some toning.image
    Paul
  • RYKRYK Posts: 35,799 ✭✭✭✭✭
    Depending on how they got there, some of us might like them better with the stains. image
    My Box of 20: https://pcgs.com/setregistry/collectors-showcase/box-20/ryks-gold-box-20/17132
  • BroadstruckBroadstruck Posts: 30,497 ✭✭✭✭✭
    If a Goat is good for recoloring copper... A Sheep might remove stains on gold image

    imageimage
    To Err Is Human.... To Collect Err's Is Just Too Much Darn Tootin Fun!
  • keetskeets Posts: 25,351 ✭✭✭✭✭
    that picture is just not right!!image
  • IndianHeadManIndianHeadMan Posts: 826 ✭
    ask the dudes that conserved the Saddleridge hoard.
  • coinhackcoinhack Posts: 1,173 ✭✭✭✭
    Maybe ask Don Kagin? Their work looks pretty nice.
  • dcarrdcarr Posts: 9,072 ✭✭✭✭✭


    << <i>I also hear vinegar, lime juice, baking soda or potato juice can work as well. >>



    Hmm, what am I doing wrong. I can't seem to get any juice out of this here potatoe image
    Moonlight Mint
  • LakesammmanLakesammman Posts: 17,455 ✭✭✭✭✭
    Keets:

    Any pictures?? I'm with RYK on this one. image
    "My friends who see my collection sometimes ask what something costs. I tell them and they are in awe at my stupidity." (Baccaruda, 12/03).I find it hard to believe that he (Trump) rushed to some hotel to meet girls of loose morals, although ours are undoubtedly the best in the world. (Putin 1/17) Gone but not forgotten. IGWT, Speedy, Bear, BigE, HokieFore, John Burns, Russ, TahoeDale, Dahlonega, Astrorat, Stewart Blay, Oldhoopster, Broadstruck, Ricko, Big Moose, Cardinal.
  • stevebensteveben Posts: 4,635 ✭✭✭✭✭
    you may want to leave it. gold doesn't rust and it could be just copper spotting/staining...which isn't necessarily a bad thing.
  • rickoricko Posts: 98,724 ✭✭✭✭✭
    It is copper spotting. It appears rust-like. Cheers, RickO
  • BAJJERFANBAJJERFAN Posts: 31,276 ✭✭✭✭✭


    << <i>

    << <i>I also hear vinegar, lime juice, baking soda or potato juice can work as well. >>



    Hmm, what am I doing wrong. I can't seem to get any juice out of this here potatoe image >>



    Get one from Idahoe!
    theknowitalltroll;
  • keetskeets Posts: 25,351 ✭✭✭✭✭
    It is copper spotting. It appears rust-like.

    definitely not copper spotting and not something in the alloy, it is either a stain of some type on the surface of the coin from storage or a foreign substance that is the color of rust. I left it soaking in acetone overnight while I consider what to do. thanks for the input, I'll update in a few hours.
  • astroratastrorat Posts: 9,221 ✭✭✭✭✭


    << <i>that picture is just not right!!image >>

    The picture is odd, but it's the smiling that makes it a bit too creepy! image
    Numismatist Ordinaire
    See http://www.doubledimes.com for a free online reference for US twenty-cent pieces
  • keetskeets Posts: 25,351 ✭✭✭✭✭
    after an overnight soak in acetone and gentle prodding with a toothpick I was able to remove most of whatever is on the coin. in-hand with no magnification the color is almost imperceptible, but with a 10X loupe it is clearly seen, not bad since it is near the rim and around two stars. after this and from seeing quite a bit of mishandling/poor storage over the years I have to think that the next generation of collectors will benefit from much of what goes on at this site, even though at times we seem to get bogged down on the negative aspects of collecting. the positive thing is that collectors nowadays have a better grasp on what harms coins and we are equipped with better storage/preservation. hopefully that translates into coins we can pass along which look close to how they were when we acquired them

    I guess I should mention that the coin in question was a 1915 raw $10 Indian in AU grade that was part of a large collection that came to us mid-week. absent the stain/contaminant it had an MS reverse with clean, mark free obverse fields and only light chatter and rub on the cheek and headdress. what a great design.image
  • MGLICKERMGLICKER Posts: 7,995 ✭✭✭


    << <i>Depending on how they got there, some of us might like them better with the stains. image >>



    Agree.

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