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White metal kits parts have turned black. Problem?

Discussion in 'General Figure Talk' started by mm70882013, Nov 13, 2023.

  1. mm70882013 Member

    Hello,

    I recently acquired some Michael Roberts Ltd American Civil War kits for which I have been hunting.

    They are new old stock condition. The kits are cast in resin with white metal weapons and accouterments.

    The white metal parts have turned black, almost as if tarnished. This is easily removed. There is no other damage… no pitting… just a coating of black.

    My questions are:

    1. Do these parts need to be treated with anything prior to priming/painting?
    2. Why have these parts turned black? I’ve never seen this before, and I have much older metal kits.
    3. Of the three MR kits I bought, all three are affected. Is this something particular to his metal castings?
    4. I’ve heard of, but never seen, “lead disease.” Is this the start of lead disease?
    5. If lead disease, I think I read that immersion in vinegar for several hours will stop it?

    Any help appreciated.
  2. kevininpdx Well-Known Member

    Country:
    United-States
    Lead disease involves pitting so probably not. It could be after an acetone wash to strip the paint. That’s what I use and it turns the metal almost black. The metal is still good though. Maybe post a picture. I’m curious how black is black.
    theBaron likes this.
  3. Blind Pew A Fixture

    Country:
    United-Kingdom
    When I've encountered lead disease (or what I thought was lead disease) it was akin to a crusty salt-like layer that appeared on the metal surface. The metal parts might have been soaked in something to remove paint, etc. and that might not have been totally rinsed off itself. Perhaps it's residue from this.
  4. Tecumsea PlanetFigure Supporter

    Country:
    England
    Lead disease is very obvious, I have experienced it on David Grieve Kits. It leads to a powdering and pitting on the metal which is hard to rectify. If the black you are experiencing will be easily removed with a wire brush then after priming the kits should be fine.

    Keith
    Babelfish likes this.
  5. mm70882013 Member

    Thanks for the help so far. I should have included a photo in the first post.

    I do want to say thanks to the member who sent me the procedure to treat/cure lead disease. Much appreciated.

    Here is the photo. I do want to note that the kit was new and not opened, so no strippers or solvents were used on this.

    IMG_7385.jpeg
    Babelfish and Blind Pew like this.

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