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  1. #1
    Join Date
    Sep 2004
    Posts
    239

    Rust on Cast Iron

    Looking for a good remedy to remove surface rust and the rust stain that is underneath the rust spot on cast iron.

    I am going to try a brass brush with some solvent (gas, kerosene or other) but I figured I would ask the group here first. I am hoping a brass brush will not scratch the cast iron since some of the spots are on a smooth area of cast iron.

    Your suggestions please.

    Chris

  2. #2
    Join Date
    Nov 2004
    Posts
    446
    Paint Stripper...

    Sandblasting or more gential Plastic Blasting works great..

    Depends on how bad the rust is..

    ..
    Murphy

  3. #3
    Nono Guest
    Ever considered Naval Jelly? You Can buy it at ome Depot or Lowes...Once clean use johnsons paste wax to seal against moisture...

  4. #4
    Join Date
    Sep 2004
    Posts
    239
    Thank you both for your suggestions.

    I will let you know how it went after I try one or both methods.

    Chris

  5. #5
    Join Date
    May 2003
    Posts
    325
    Chris:
    Please do post your results. I have a similar situation; I cleaned some parts with paint thinner and did not immediately oil coat them (my bad ). The next morning there were several rust spots. The rust cleaned up with just light machine oil and 0000 steel wool but left dark stains. I would be much interested in any successful means of removing the stains.

    robotic regards,

    Tom
    = = = = =
    "Do you think if we licensed poets, that they would still take poetic license?"
    - - Dennis R. Ridley

  6. #6
    Join Date
    Mar 2003
    Posts
    35538
    I've used this Rust-Free stuff for my table saw and all my other tool tops, it works great.

    http://www.eagle-america.com/html/ca...oup.asp/334293

    Then cover with Top Coat to prevent rusting.
    http://www.eagle-america.com/html/ca...oup.asp/332788
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  7. #7
    Join Date
    Dec 2004
    Posts
    524
    Quote Originally Posted by ChrisJ
    Looking for a good remedy to remove surface rust and the rust stain that is underneath the rust spot on cast iron.

    I am going to try a brass brush with some solvent (gas, kerosene or other) but I figured I would ask the group here first. I am hoping a brass brush will not scratch the cast iron since some of the spots are on a smooth area of cast iron.

    Your suggestions please.

    Chris
    If gasoline doesn't work, try ether. Be sure to smoke while you are using it. :-)

    Gasoline is good for running cars. And reasonably safe. But it should NEVER be used as a cleaner, solvent, for washing your hands, etc. It should never be stored indoors.

    Ken
    Kenneth Lerman
    55 Main Street
    Newtown, CT 06470

  8. #8
    Join Date
    Sep 2004
    Posts
    239
    I guess using gasoline to lubricate the double sided tape on the end of my golf clubs when I am regripping is a no no also?

    Well I tried both a paint stripper and a version of naval jelly. The naval jelly worked very good. Paint stripper didn't work so well, but it could have been my technique. I bought the naval jelly from a automative store. It was labeled as a rust remover but I believe it has the ingredient(s), like phosphoric acid that are listed in naval jelly.

    Only thing I found was that the stain went from a rust color to a white color (cloud). Guess it is better than it looking like rust. I could not remove the white stain with either a brass brush or steel wool.

    To seal the cast iron, I already had some Rust inhibitor by "Crown". I believe it is lanolin based. I think it works really well.

    Chris

  9. #9
    Join Date
    Mar 2003
    Posts
    35538
    Quote Originally Posted by ChrisJ
    I guess using gasoline to lubricate the double sided tape on the end of my golf clubs when I am regripping is a no no also?
    I use lacquer thinner. Golfsmith used to sell Naptha I think for regripping, before they came out with the environmentally friendly stuff that doesn't work very good.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  10. #10
    Join Date
    May 2003
    Posts
    550
    I can second Ger's recommendation of RUST-FREE, it did an excellent job on my PM66 table top. Boes works well keeping it rust free even in a FL climate.

    As an aside, is the cast iron a working surface or just cosmetic? If its decent quality cast then you can make it highly rust resistant just by heavily burnishing it with a wire brush. Loads of old bridges where treated this way, or to keep on the enviromentally incorrect theme, black leading the cast was a method of maintaining cast iron stoves for generations... All of it was bloody hard work though....

    Andrew

  11. #11
    Join Date
    May 2005
    Posts
    1810
    For smooth surfaces such as a machine table or drill press column - Once the rust is removed, try waxing it two or three times in a row with a carnuba-based car wax.

    No kidding.

    Scott

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