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Technical removing old pitted chrome plating

Discussion in 'The Hokey Ass Message Board' started by upspirate, Oct 9, 2017.

  1. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
    Member

    How do you remove old chrome plating?
    I've got an old shifter handle that is badly pitted, and just want to remove the pits and smooth it out for paint....not going to have it re-chromed, just want it smooth.
    I've tried wire wheeling it, but that didn't work well. Any ideas for me?
    IMG_1269.JPG IMG_1268.JPG IMG_1267.JPG
     
  2. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
    Member

    I know it's an O/T part, but the process should be the same as say a Hurst shifter handle
     
  3. squirrel
    Joined: Sep 23, 2004
    Posts: 46,371

    squirrel
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    I had a chrome shop do that on a few parts, years ago.
     
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  4. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
    Member

    Jim,If I was going to re-chrome it I would do that, but don't want to spend that much money or time on this project
     
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  5. 56premiere
    Joined: Mar 8, 2011
    Posts: 1,445

    56premiere
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    from oregon

    I've heard muriatic acid. Not sure
     
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  6. rjones35
    Joined: May 12, 2008
    Posts: 865

    rjones35
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    Grinder, then smooth it out again.
     
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  7. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
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    Yea, thought about maybe a grinder or a flap wheel.....
     
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  8. squirrel
    Joined: Sep 23, 2004
    Posts: 46,371

    squirrel
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    Since it's a relatively small part, grinding will work. Have fun, be careful.
     
  9. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
    Member

    Yep, tired of getting crap in my eyes.....eye protection now days
     
  10. mohead1
    Joined: Jan 18, 2013
    Posts: 561

    mohead1
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    Flapping wheel or a flapping disc on a grinder....that way less chance of excessive material removal

    Sent from my SM-G900V using Tapatalk
     
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  11. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
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    Thanks , have to try that
     
  12. redo32
    Joined: Jul 16, 2008
    Posts: 1,673

    redo32
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    Hey U P... What is the shifter off of? I don't recall ever seeing one like that. It appears to be die cast potmetal. Do Not soak it in muratic acid..IT WILL DISSOLVE. It can be reverse stripped in sulfuric acid, but if you don't want to farm it out to a plating shop, the best bet is to sand it down with flap wheels.
     
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  13. Chiss
    Joined: May 12, 2017
    Posts: 223

    Chiss
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    from S.C.

    A Drimmel will give better results, especially in the groves, more control and less Material loss.......
     
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  14. ceege
    Joined: Jul 4, 2017
    Posts: 204

    ceege
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    from NW MT

    Hit it with a sand blaster. Hit it with epoxy primer. Hit it with a lot of surface primer. Sand smooth. Top coat with your desired finish.
     
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  15. What ceege said
     
  16. alchemy
    Joined: Sep 27, 2002
    Posts: 15,663

    alchemy
    ALLIANCE MEMBER

    I would put in the blasting cabinet. You can go easy on it until you see how the parent metal reacts.
     
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  17. The no-labour no-grinding crud method is to remove it the way it went on- electrically.
    Google and a battery charger are your friend.
     
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  18. Just begin the de-pitting process and the chrome will be the first to go.

    To get the pits out the entire surface comes down to level of the deepest pits. Blasting works to remove the chrome and the crap in the pits and that leaves you with clean pits. Then you need to start the de pitting/grinding process
     
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  19. simpsonrl
    Joined: Aug 31, 2017
    Posts: 79

    simpsonrl

    Just out of curiosity, if the part was to be re-chromed, how would you go about repairing / filling the pits? Maybe some of the those magic solders that fix aluminum?


    Sent from my iPhone using H.A.M.B.
     
  20. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
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    The handles are made of brass with chrome plating.
    The pits don't go beyond the chrome in this case, but that is a good question.
    I'm just going to smooth it best I can and paint, probably with hammer-tone paint for my application.That way the surface won't be noticeable yet it won't be rough and corroded either
    I think the chrome shops do the repairs, but not sure what they do.
     
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  21. redo32
    Joined: Jul 16, 2008
    Posts: 1,673

    redo32
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    Hey UP , we talked about the handle being brass, but as I go back to the pictures it still looks like potmetal to me. Brass will usually not corrode that way. Never the less, still a good deal to use flap wheel very carefully until you get a feel for the base material. Watched a guy in a plating shop lean on a belt buckle and it literally melted away. It was made of pewter and is very soft.
     
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  22. upspirate
    Joined: Apr 15, 2012
    Posts: 2,196

    upspirate
    Member

    The pitting is in the plating, not the base metal.I was going by the link I PM'd you that said the parts were brass.
    I would have thought them bronze in that application.
    Anyhow, I will go lightly as I've never used a flap disc before.
    H-D had so many different sizes and arbor sizes that I had to come home and see what my angle grinder is as I haven't used it in a while.
     
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  23. All I know is powder coating has gotten so cheap I would just do that. Pick any color and be done with it.
     
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  24. There was a thread on here recently on "Muggy weld" die cast repairs- interesting stuff.
     
  25. Los_Control
    Joined: Oct 7, 2016
    Posts: 690

    Los_Control
    Member
    from TX

    while bored watching news, I used sand paper to clean the chrome off my gauge bezels, wanting the brass finish instead .... it was good chrome when started.

    IMG_20170201_164505579.jpg IMG_20161116_122232659.jpg
     
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  26. Fortunateson
    Joined: Apr 30, 2012
    Posts: 3,224

    Fortunateson
    Member

    To fill pits have the old chrome removed and then have it "copper struck" (copper plated). Then simply fill the pits with solder. Sand and then polish. Send for chroming.
     
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  27. More than likely that was nickel plating, if it was just over brass.
     
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  28. simpsonrl
    Joined: Aug 31, 2017
    Posts: 79

    simpsonrl

    Is that the way to do it even if the base material is zinc die cast or pot metal or similar? Thanks


    Sent from my iPhone using The H.A.M.B. mobile app
     
  29. The Shift Wizard
    Joined: Jan 10, 2017
    Posts: 2,001

    The Shift Wizard
    ALLIANCE MEMBER

    Put a magnet on it. I wouldn't be surprised if the brass you're seeing is also plating.

    It almost looks forged to me.... unless you see some mold lines
     
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