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Thread: Rust repair under battery tray (pix) what do you suggest?

  1. #1
    Join Date
    Jun 2002
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    SCCoA Member#1257
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    3,330

    Rust repair under battery tray (pix) what do you suggest?

    Iím doing some work on the 35th and I removed the battery. I was a little shocked to find some of the metal under the battery tray was being eaten out. The car has less than 60k miles, so itís most likely due to battery acid from an old or faulty battery. I know the most permanent fix is cutting and re-welding a new metal pieceÖbut that will probably be in the future. Iím curious what you guys suggest as the next best approach without cutting and welding?
    Thanks for any input fellas.



    Current: 1993 SC 5.0L Auto Red, 1994 SC 5-speed Teal, 1995 SC 5-speed Chameleon Blue
    Old: 89 SC auto Twilight Blue, 89 SC stick Titanium, 90 35th stick, 92 Sport 5.0L stick, 94 SC stick Black, 1994 SC Auto Teal
    Also: 1992 Feature Mustang Convertible 5-speed Vibrant Red, 1991 BMW 850i 6-speed Red, 1994 BMW 850CSi 6-speed Red

    www.mamn12.com for your mid-atlantic mn12 needs!

  2. #2
    Join Date
    Dec 2007
    Location
    Salem OR
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    6,938
    Ouch, yep, acid...caught it just in time.

    Used POR 15 in the past on older cars with very good results - it's good stuf:

    https://www.amazon.com/POR-15-45004-.../dp/B00H2VVL0S

    A quart should be more than enough for that area. Just be sure to follow the directions for best results.

    Ken
    Last edited by KMT; 03-08-2019 at 10:51 PM. Reason: Added link

  3. #3
    Join Date
    Feb 2003
    Location
    Tinton Falls, NJ
    Posts
    1,574
    First wash it down with water and baking soda to neutralize any residual acit. Next hit it with a wire wheel on both sides. You will have to remove the wheelhouse liner to access the underside. After that, coat it with POR15 on both sides, then spray paint it with some Rustoleum on both sides. That should stop the rust where it is.

  4. #4
    Join Date
    Jun 2002
    Location
    SCCoA Member#1257
    Posts
    3,330
    thanks for the suggestions gents.
    Current: 1993 SC 5.0L Auto Red, 1994 SC 5-speed Teal, 1995 SC 5-speed Chameleon Blue
    Old: 89 SC auto Twilight Blue, 89 SC stick Titanium, 90 35th stick, 92 Sport 5.0L stick, 94 SC stick Black, 1994 SC Auto Teal
    Also: 1992 Feature Mustang Convertible 5-speed Vibrant Red, 1991 BMW 850i 6-speed Red, 1994 BMW 850CSi 6-speed Red

    www.mamn12.com for your mid-atlantic mn12 needs!

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