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Thread: cosmoline

  1. #1
    Join Date
    Aug 2013
    Posts
    378

    Default cosmoline

    this seller says "the correct way to parkerize is to finish w/ cosmoline." what are your thoughts and experience ?

    http://www.ebay.com/itm/Cosmoline-fo...19.m1438.l2649

  2. #2
    Join Date
    Dec 2001
    Posts
    250

    Default

    Steve, Us boys out here in the foothills of NorCal have been using cosmoline to finish our parkerizing for sometime now with great results. We capture it off NOS WW2 45 parts that are covered in it. Regards, Rich
    DrSprocket

  3. #3
    Join Date
    Aug 2013
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    378

    Default

    What does the cosmoline do that engine oil does not ?

  4. #4

    Default

    Quote Originally Posted by Steve Swan View Post
    What does the cosmoline do that engine oil does not ?
    more points when playing scrabble for cosmoline.?

  5. #5
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    3,069

    Default

    Quote Originally Posted by Steve Swan View Post
    What does the cosmoline do that engine oil does not ?
    It stains it, Steve!

    Its just one of the reasons why parkerizing should not match over a complete machine.

    Cosmoline is basically a thick petrolatum, which is what I have used.

    ....Cotten
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  6. #6
    Join Date
    Aug 2013
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    378

    Default

    I'm trying to learn. So cosmoline stains. Engine oil does not ?

    After parts are taken from MgSO4 bath, is cosmoline applied with a brush only while part is hot ? Or can cosmoline be applied to a cold freshly parkerized part ?

  7. #7
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    3,069

    Default

    Steve!

    Cosmoline varied.
    Please remember that Parkerizing prevents corrosion by its affinity for the petroleum derivative with a weak bond. And a chemical stain reflects light differently than a dirt or carbon stain. Most modern oils are relatively clear, and rarely reddish.

    Warmth lets the waxy jelly penetrate and cover evenly; A paintbrush and vaseline in the hot summer sun is a great way to maintain parkerizing upon a machine in duty, although I am very very fond of a heatlamp and Johnson's Wax on the bench.

    And Parkerizing varied too.

    ....Cotten
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    Last edited by T. Cotten; 07-17-2017 at 02:39 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

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