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Scotch Brite on rotor?

Discussion in 'XJ Technical Chat' started by kleraudio, Jul 9, 2013.

  1. kleraudio

    kleraudio Member

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    Someone had mentioned I should scotch brite my rotor. Can anyone explain the procedure?

    Do I literally get a bunch of scotch brite and start rubbing vigorously on the rotor?
     
    kleraudio, Jul 9, 2013
    #1
  2. Polock

    Polock Well-Known Member

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    whatever you do will be gone after 5 stops, better of spraying them off with brake cleaner to get rid of any oil
     
    Polock, Jul 9, 2013
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  3. cutlass79500

    cutlass79500 Well-Known Member

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    Polock is correct scotch bright will not do anything. Why do you thing you need to scotch bright it? If your replacing the pads you can brake the glaze some what with a piece of coarse sandpaper spin the wheel and move it back and forth on the rotor til most of the shine is gone. It puts a cross hatch in the rotor and the pads will seat a bit faster but that does not last long either.
     
    cutlass79500, Jul 9, 2013
    #3
  4. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    It's called "breaking the glaze" and it really depends on the current condition of your rotors.
    We can't turn these rotors, for a variety of reasons.
    You could rub them radially (against the grain) with some 320 grit to get some "tooth" on the surface. +1 on cleaning them.
    (Cutlass beat me )
     
    TIMEtoRIDE, Jul 9, 2013
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  5. kleraudio

    kleraudio Member

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    Ok cool. I'll grab some 320 sandpaper (any will do?) and then hit it with brake cleaner. Thanks!
     
    kleraudio, Jul 9, 2013
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  6. Thrasher

    Thrasher Member

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    I took mine off and blasted them with a fine media in a booth. It took all the years of old brake pad crap off and gave them a fresh start.
     
    Thrasher, Jul 10, 2013
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  7. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    Too coarse of paper and you will see the scratches for thousands of miles - I wouldn't use 180.
     
    TIMEtoRIDE, Jul 10, 2013
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  8. chris123

    chris123 Active Member

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    I found a video featuring Ari Henning which recommends spinning the front wheel while holding scotch brite to the rotor.

    I've read that some use sandpaper or media blast. I've also read that sandpaper or media blasting can embed bad juju into the rotors. BUT, 3M has a "Brake Rotor Surface Conditioning Kit" which includes 120 grit Aluminum Oxide Abrasive Discs. You'd think 3M put some R&D in before making a kit like this..

    I have some Scotch-Brite Roloc brake hub cleaning discs sitting around from a previous brake job I was thinking of trying. These are "Extra Coarse" though. Probably 80 or 40 grit equivalent.

    Any newer opinions on de-glazing rotors and/or conditioning rotors for new pads?

    EDIT: I found a video on YouTube. The guy uses a rotary polisher/sander with 80 and 100 grit sandpaper. Looks great when he's done.
     
    Last edited: Oct 14, 2023
    chris123, Oct 14, 2023
    #8

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