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Cleaning Yellowed Plastic Reservoirs

Discussion in 'Technical Q&A' started by swift53, Jul 29, 2020.

  1. swift53

    swift53 F1 Rookie
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    Nov 17, 2007
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    Alberto
    Found this on BaT: author unknown.

    For what it’s worth, I thought I would offer a simple way to restore those old ‘yellowed’ and often hard to find hydraulic Clutch and Brake reservoirs. At least it’s worth a try before spending time and money trying to find a NOS replacement.

    Of course, no guarantees, but it worked for me.

    First, drain the brake fluid, remove the ‘Discolored’ reservoir, and clean it/them thoroughly.
    Next source a bottle of Crème Developer (40 Vol – Peroxide Crème) from your wife’s stash or at your local beauty salon/supplier.

    Day 1 – Find a large Zip lock bag, add two cups of Developer and place the reservoir(s) in the bag, Zip it closed and swish the developer around ensuring that everything is completely coated. Leave the bag out in the direct sunshine for a complete day (Min 65F, 18C).

    Day 2 – Open the bag to release any gas and pressure build up. Zip the bag closed, swish again to thoroughly coat the reservoir(s) and leave out in the direct sunlight for a full day.

    Day 3 – Repeat the process one last time.

    Day 4 – Remove the reservoir(s), rinse thoroughly in warm, soap & water and blow ‘air’ dry

    ‘Voila’ – You should have a ‘White’ Reservoir(s).

    Regards, Alberto
     
    05elise and Ray Smith like this.
  2. tazandjan

    tazandjan Three Time F1 World Champ
    Owner Lifetime Rossa

    Jul 19, 2008
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    Clarksville, Tennessee
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    Terry H Phillips
    Peroxide will rust stainless steel and apparently it will turn plastic white, too. They taught us the first part in chemistry, but not the last part. We were trying to use 98% peroxide as the oxidizer for a rocket engine, but it kept eating the injectors.
     
    swift53 likes this.
  3. swift53

    swift53 F1 Rookie
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    Nov 17, 2007
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    Alberto
    Terry, pretty strong stuff at that ratio...
    with the above 40 Vol recipe, it "should work"
     

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