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Thread: Mill Scale

  1. #1
    Join Date
    Mar 2007
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    Default Mill Scale

    All you guys that make things that stay outside, like trailers and such...
    do you worry about mill scale? My friend that used to build boat trailers, would lightly grind all his c-channel and everything else to take the mill scale off. Always warned me, that if you left it on, it would be the first place to rust. Needle gun or flapper wheel would somehow embed the mill scale into the good metal, so the grinding stone was better...any truth to that for you guys????
    thanks,
    bert
    I'm not late...
    I'm just on Hawaiian Time

  2. #2
    Join Date
    Aug 2006
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    near rochester NY
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    Default

    some one on the ask andy side made a stripper for his square tube for mill scale removal. but i cant remember if rust was why he removed it ?? might be werth looking for, if i find it i'll post ya a link.
    thanks for the help
    ......or..........
    hope i helped

    feel free to shoot me an e-mail direct i have time to chat. james@newyorkmetalart.com
    summer is here, plant a tree. if you don't have space or time to plant one sponsor some one else to plant one for you. a tree is an investment in our planet, help it out.
    JAMES

  3. #3
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    Default

    thanks James, look forward to it
    I'm not late...
    I'm just on Hawaiian Time

  4. #4
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    Midland, Mi.
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    Default

    Yes, the mill scale has to come off if you don't want rust. I sand blast everything before painting, a good coat of epoxy primer, a urethane color coat, and it will pretty much last forever.

  5. #5
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    Default Ts-off-road

    Yeesh! I wish I could sandblast everything! Over here, you're talking at least $100 for something small! Well, size of a coffee table for example
    Price jumps as you get bigger of course...and I don't have anywhere to sandblast. Do you sandblast yourself? What kind of epoxy primer do you use?I'm thinking of "do it yourself type...
    thanks,
    bert
    I'm not late...
    I'm just on Hawaiian Time

  6. #6
    Join Date
    Jan 2007
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    Midland, Mi.
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    313

    Default

    Quote Originally Posted by Bert View Post
    Yeesh! I wish I could sandblast everything! Over here, you're talking at least $100 for something small! Well, size of a coffee table for example
    Price jumps as you get bigger of course...and I don't have anywhere to sandblast. Do you sandblast yourself? What kind of epoxy primer do you use?I'm thinking of "do it yourself type...
    thanks,
    bert
    The smaller projects I'll sandblast behind the shop and paint myself. I have a siphon feed blaster with a 5gal pail as a hopper, good enough for the small stuff. Omni, I believe is the brand of epoxy and paint. I get it at Napa. For larger projects, like a trailer or a chassis, I have a local paint shop do all the dirty work. It adds to the cost but a quality finish that will last many years is worth it and most customers are willing to pay for it.

  7. #7
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    Default

    very cool! last question, seems obvious, but: the epoxy is a 2 parter? I've seen stuff they call epoxy but it's just a 1-part thing.
    I'm not late...
    I'm just on Hawaiian Time

  8. #8
    Join Date
    Mar 2006
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    Ocean City, Maryland
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    Default

    We buy pipe called clean kote [I think] which has no mill scale on it and paints real well. Doesnt cost much more but dont have to clean up to paint. I think cold rolled has no mill scale and hot rolled does, I also think cold rolled is a little more expensive too. Hot rolled is a little softer it seems than cold so bending is a little easier. The dimensions on the cold rolled seem to be better though, that is if it matters that much to your project.
    Scott
    HMW [Heavy Metal welding]

  9. #9
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    Jan 2007
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    Midland, Mi.
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    Default

    Quote Originally Posted by Bert View Post
    very cool! last question, seems obvious, but: the epoxy is a 2 parter? I've seen stuff they call epoxy but it's just a 1-part thing.
    Yes, it's a 2-part epoxy that I use. After you mix it, you have a certain amount of time to apply it and the color must also be applied within a couple of hours.

    HMW, cold rolled is nice to work with and I have used it for many projects, but I still prep the surface the same way as I do hot rolled before painting.

  10. #10
    Join Date
    Mar 2006
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    Ocean City, Maryland
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    951

    Question

    Did you say you get it from NAPA?
    Scott
    HMW [Heavy Metal welding]

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