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How to get rid of rusty spots on stonewashed blade

Discussion in 'Maintenance, Tinkering & Embellishment' started by owensidharta, Apr 15, 2018 at 11:47 PM.

  1. owensidharta

    owensidharta Platinum Member Platinum Member

    22
    Nov 28, 2014
    Hi folks,

    I have some questions and need your expertise suggestions :
    I have a stonewashed blade knife. The blade's material is N690C. I carried it inside my jeans pocket. Because I sweat a lot and the weather here in Indonesia is humid , there are tiny rusty spots that shown up on the blade. How to get rid of those rusty spots? Which materials(Oils?) can be used to get rid of those rusty spots?

    Hope to hear from you guys soon.

    Thank you.

    Owen.
     
  2. anthonycastorena2014

    anthonycastorena2014 Gold Member Gold Member

    317
    Nov 27, 2014
    I just about always use mothers mag polish (automotive section of Walmart), autozone, Oriley’s ect and a few make up sponges. It will Gerber the rust off easily, scratches as well if they aren’t deep. Then I wash it with soap and water until clean. When you get done wipe the blade down with a “Tuff-Cloth” or wipe it with oil. You will be able to get the rust out then keep them from coming back. Hope this helps!
     
  3. owensidharta

    owensidharta Platinum Member Platinum Member

    22
    Nov 28, 2014
    S
    So, using mothers mag polish and a few make up sponge (Or any other sponge or cloth) can wipe out those tiny rusty spots? Which oil do you use for keep the rust coming back? Thanks!
     
    anthonycastorena2014 likes this.
  4. hhmoore

    hhmoore Gold Member Gold Member

    Feb 7, 2014
    If you use your knife to cut food, just use a light application of mineral oil.
     
  5. owensidharta

    owensidharta Platinum Member Platinum Member

    22
    Nov 28, 2014
    thanks,man
     
  6. If you can get it in Indonesia, Bar Keepers Friend powder, mixed to a paste with some water, works well for this.

    Use a Q-tip to apply the paste to the spots. Let it sit for ~ 30 - 60 seconds, then rinse it off. Don't leave it on the steel too long; the oxalic acid in the BKF powder will dissolve the rust, but can also etch the steel if it sits too long (longer than a minute or so). You shouldn't need to sand or polish anything at all, so there's minimal risk of altering the finish on the blade.
     
    Last edited: Apr 16, 2018 at 9:13 AM
    anthonycastorena2014 likes this.
  7. maximus83

    maximus83 Gold Member Gold Member

    Nov 7, 2011
    David's tip of using BKF has worked well on most jobs, and it works quickly and cleans up easily. Another option for really stubborn rust spots, get a special corrosion inhibitor and give it a long soak. I had a really stubborn rust around the thumbhole on a nice folder, I soaked it for nearly 2 days in my favorite corrosion protectant and gun oil--CorrosionX--and that took care of it.

    If you can't get BKF easily, there are numerous homemade solutions that work nearly as well for removing light rust from stainless, such as white vinegar or baking soda. For example, make a paste of baking soda and water, and gently scrub the rust spots with a toothbrush.
     
  8. anthonycastorena2014

    anthonycastorena2014 Gold Member Gold Member

    317
    Nov 27, 2014
    I use a tuff cloth. It is a polishing cloth impregnated with tuffglide. So to answer your question tuff glide. You can use Marine tuff glide as well to prohibit rust, there is also a marine tuffcloth
     
  9. USMCPOP

    USMCPOP

    282
    Jan 6, 2016
    The active ingredient in Barkeeper's Friend is Oxalic Acid = Bubuk Oxalic/Bubuk Osasir/Asam Oksalat in Indonesia as far as I can tell. There may be some cleaners that contain it, but watch out for other ingredients that might be more corrosive.

    You night try dabbing some Coca-Cola on the rust spots. It contains phosphoric acid.
     
  10. owensidharta

    owensidharta Platinum Member Platinum Member

    22
    Nov 28, 2014
    Thanks,man. But, unfortunately, it is not available in Indonesia :(
    And importing it is impossible because i do not have a chemical importing permits :(
     
  11. owensidharta

    owensidharta Platinum Member Platinum Member

    22
    Nov 28, 2014
    Thanks, man :)
    Will try the baking soda + water then...
     
  12. owensidharta

    owensidharta Platinum Member Platinum Member

    22
    Nov 28, 2014
    tuff cloth is not available in my country too :(
    Thanks,brother...
     
  13. owensidharta

    owensidharta Platinum Member Platinum Member

    22
    Nov 28, 2014
    I will try to find the "bubuk oxalic" in Indonesia. Thanks,man!
     

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