1. Time for some upgrades in server hardware and software to enhance security and take AK to the next level. Please contribute what you can to sales@audiokarma.org at PayPal.com - Thanks from the AK Team
    Dismiss Notice

"I've made a terrible mistake" - Gob

Discussion in 'Marantz Audio' started by StoryMe, Oct 30, 2018.

  1. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    26,521
    Location:
    Angel Station, Alabama
    Giddy-up 409.
     

     

    Please register to disable this ad.

  2. kaplang

    kaplang Works for me ! Subscriber

    Polishing wheel with jewelers rough might do it
     
  3. kaplang

    kaplang Works for me ! Subscriber

    Looks like it does well for the heat sinks but what will it do to the plastic in the knobs?
     
  4. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    26,521
    Location:
    Angel Station, Alabama
    Probably nothing, it's not a solvent.
     
  5. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    26,521
    Location:
    Angel Station, Alabama
    It will alter the satin finish to a high shine.
     
  6. Sandstrom

    Sandstrom Seldom turns out the way it does in the song Subscriber

    Messages:
    1,863
    Location:
    Cincinnati
    I'm a little off that way o_O:biggrin:
     

     

    Please register to disable this ad.

  7. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    420
    Location:
    Orange CA
    A wood dowel with 150-220 or finer grit paper in a drill press or a very steady hand can “machine” the fronts of the knobs. It’s a Hail Mary to salvage a knob. Big dowel with paper attached using contact cement with a small dowel attached in the middle as a shank for the chuck to grip. A deft touch is needed given how thin the metal on the knobs are. Exeperiments are called for first to make sure it is what you want/need todo. This would a case of something close is better than nothing
     
    Steven Tate likes this.
  8. StoryMe

    StoryMe New Member

    Messages:
    9
    Ok...an update: I bought some Flitz and polished those knobs something fierce. And it helped. But they are definitely not back to 'normal' condition. They look a bit more 'chrome' now. It's a darker, shinier look. It's ok. It's better. Kind of. Unfortunately the Flitz did not fix the most burned/stained marks on the knobs. So, I'm afraid I'm back in the market for some knew ideas or knobs.

    Some progress shots below.
     

    Attached Files:

  9. StoryMe

    StoryMe New Member

    Messages:
    9
    Oh, good sir. By all means, bust away. I doubt you could give me half as hard of a time as I've given myself. You'd think I'd gambled away the title to my house.
     
  10. StoryMe

    StoryMe New Member

    Messages:
    9
    So, I tried the Deoxit solution here as well. Didn't do anything in this case I'm afraid. But appreciate the idea. I hadn't considered that.
     
  11. StoryMe

    StoryMe New Member

    Messages:
    9
    Confirmed. It did shine them up pretty good. Much more of a chromed look
     
    onepixel likes this.

     

    Please register to disable this ad.

  12. StoryMe

    StoryMe New Member

    Messages:
    9
    Well Bob. My first and second attempt at a fix (Flitz and Deoxit) didn't cut it. I'm back to being out of ideas. I'll take whatever you've got.
     
  13. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    26,521
    Location:
    Angel Station, Alabama
    This;
    "I've made a terrible mistake" - Gob
     
  14. Steven Tate

    Steven Tate AK Subscriber Subscriber

    Messages:
    2,913
    Location:
    N. Richland Hills, TX
    If they look like a total loss, I'm intrigued with Mike Sweeny's idea of a wood dowel shaft in a lathe or drill press with some fine sandpaper or emory cloth. It would be interesting to see if it looked anything like the original after the treatment.
     
  15. John James

    John James "Bob's your uncle" (Stolen) Subscriber

    Messages:
    8,336
    Location:
    Piney Flats, Tn.
    0000 steel wool and a way to spin the knobs would be my next try.
     
  16. cemerson

    cemerson AK Subscriber Subscriber

    Messages:
    115
    Location:
    Smithfield, VA
    That's what I'd go for, the steel wool on them in a drill press. What do you have to loose at this point. I did a similar thing on a piece of aluminum with ammonia, but fortunately it wasn't my Marantz knobs, it was something I could just toss. I did learn a lesson there, of not to use ammonia on aluminum.
     

     

    Please register to disable this ad.

  17. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    420
    Location:
    Orange CA
    The sandpaper/dowel is one way they make the 'machined" look at firewalls and other sheet metal on hot rods/rat rods and the like. Its a very old school "trick" :) Remember to center the knob on the center of the dowel so you get the "round circles" and don't move it side to side at all.. a machinist vice is advised. With clamps. And luck :) maybe a beer..
     
  18. Route 66

    Route 66 AK Subscriber Subscriber

    Messages:
    714
    Location:
    Burbank
    This seems like a very good suggestion. If you know anyone with a lathe to attach the knobs to, that would probably work best with the 0000 steel wool.
     
  19. Aaron99

    Aaron99 AK Subscriber Subscriber

    Messages:
    304
    Location:
    Vancouver WA.
    I think you have damaged the clear coat. Since it looks to be almost a complete loss, you might try a clear coat stripper. I think that would take it back to the bare aluminum. It might work as long as you havn't damaged the aluminum with sandpaper/etc.... I would look at recommendations on how to remove clearcoat from aluminum rims. A couple sites I saw said to use Aircraft remover. I think I saw some on amazon. Its worth a shot trying it on one.
     
  20. Stratman

    Stratman AK Subscriber Subscriber

    Messages:
    39
    I realize this doesn't help fix the problem, but I made the same mistake using diluted dish soap left for a few days. So it's easy to ruin these. I ended up just ordering replacements on ebay.

    Expensive mistake.
     

Share This Page