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Underbody, Coating/Protection?

This is a discussion on Underbody, Coating/Protection? within the Showcar and Detailing forums, part of the General Help category; So for those of us w/ some miles in the rain, snow, etc what can be done to protect the ...

  1. #1
    Senior Member wileyCoyote's Avatar
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    1999 TransAm

    Underbody, Coating/Protection?

    So for those of us w/ some miles in the rain, snow, etc what can be done to protect the underbody and wheelwell areas?

    - get professional rustproofing, undercoating?
    - how hard to DIY?

    especially:
    - rear fender areas (along where the steel lip folds in)
    - underneath rear passenger seat area

    are these things that are usually of concern? curious if anyone has looked into this..


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    What I do? SHines-IT's Avatar
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    On the classic cars (the few) that I owned, I would have the underside sprayed with bed liner. Did great, but never had it done on a modern car.

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    024mula 024mula's Avatar
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    Quote Originally Posted by SHines-IT View Post
    On the classic cars (the few) that I owned, I would have the underside sprayed with bed liner. Did great, but never had it done on a modern car.

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    Senior Member wileyCoyote's Avatar
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    there's a place here that does it, but it's a more flexible coating than what's used on bedliners, otherwise it's similar.. also, as part of the treatment package, they also spray rust inhibitor behind many of the body panel areas (like the rear 1/4s, front 1/4s, rocker area, etc.)

    anyone had this done before?

  5. #5
    Senior Member Z28_Driver's Avatar
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    2002 Z28 Hardtop

    POR 15 works well. Rustoleum rust inhibitor paint seems to do just as good as long as the metal isn't really rusty already.
    After either of these hit it with a few thin coats of rubberized undercoating and it should help keep the rust away.
    You can do it yourself in the driveway. Put the car on jackstands or 4 ramps. Clean the bottom first. let it dry then start with the rustoleum or POR 15.
    How much rust do you have already?
    any pics?

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