best way to clean old bolts

Discussion in 'Body Restoration' started by giggity, Oct 15, 2020.

  1. simso

    simso Veteran Member

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    Yep been here done that, i have used the caswell black oxide kit as well, they looked great but rusted up again pretty quickly.

    best i have found so far, blast them clean with an oxide grit, takes seconds to blast a bolt clean, then push them into a piece of cardboard and spray the heads topside and underside with some black epoxy primer.

    this is a photo of some bolts before and after cold oxide treatment, wouldnt recommend the procees now, epoxy primer is the way to go

    https://nastyz28.com/threads/simso’s-78-rust-resto-rebuild.322687/page-5

    And the simple setup used to blast and oxide coat the bolts

    https://nastyz28.com/threads/simso’s-78-rust-resto-rebuild.322687/page-7
     
    Last edited: Oct 20, 2020
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  2. Rustles

    Rustles New Member

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    I would add a word of caution concerning bolts that will need to be torqued. Not that every bolt shouldn't be torqued but any critical bolt that needs to be torqued you should be aware of the dry versus lubricated torque tables and that ANY change to the threads might change your ability to get a good reading. My guiding principle is to buy new for any bolt that I deem critical or for other "custom" bolts that aren't easily sourced to be very gentle with the threads - generally solvent and a brass wheel. I prefer the POR products for painting the heads but agree that it can be tedious..
     
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  3. Luwi67

    Luwi67 New Member

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    It's also important to use a thread restoring die instead of a thread cutting die to clean the threads. Thread restoring die will reshape the damaged threads while a thread cutting die will shear off material from out of shape threads and leave a loose fit.
     
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  4. DennisG

    DennisG New Member

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    1 Ordinary bolts are not expensive if you buy them by weight
    2 If your concern is rusting, consider heated storage
    3 if you must use a wire wheel hold the bolt securely in vise grip pliers
    4 If the bolts are rusty, isn't the car sheet metal also rusty?
     
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  5. Bandit723

    Bandit723 Veteran Member

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    well i can tell you that 5% vinegar takes forever to get the rust off....
     
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  6. Rustles

    Rustles New Member

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    Thanks - I forgot to mention the die vs. thread restorer - good point
     
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  7. Revin

    Revin Veteran Member

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    WHAT!!!
    We are suppose to clean the screws of rust???


    That is OEM original equipment, numbers matching RUST!!!
    I could sell it! LOL
    Wonder how much 1973 rust is worth...
     
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  8. OFLHLG

    OFLHLG New Member

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    I have always just wire-wheeled mine.... doesn’t hurt the threads and cleans them up great. Just put a mild wire wheel on a bench grinder. You can hold a bolt in your hand and move it all around different ways to clean it or you can hold it with a pair pliers but you do have to be careful but this method has worked well for me
     
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  9. giggity

    giggity Veteran Member

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    Not rusted , just surface rust, and not clean. I powder coated and painted almost everything going back on, not leaving cruddy, rusty, looking bolts on there. Id kick my own ass if I saw that every time I opened the hood.
     
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  10. diablonut59

    diablonut59 Member

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