Rust... Whats the normal procedure?

Discussion in 'Bodywork' started by Adam230K, Oct 26, 2008.

  1. Adam230K

    Adam230K Hardcore MB Enthusiast

    May 1, 2007
    German oil burner
    Hi guys,

    Right i've had my 202 for over a year now and all in all i'm extremely impressed about the condition of its bodywork compared to my old car.

    I carried out a really thorough check all round the car today, and i've spotted a few things;

    1. Battery tray had an acid spill a while back and now its become slightly covered in rust.
    2. Rear passenger side wheelarch has the most minute bubble developing, it can probably last for another 2-3 years before it becomes an issue.
    3. Bootlock has like half a millimeter of paint that has flaked off (very tiny) and underneath this i can see a bit of rust. I'm guessing this will develop if the water gets underneath it.

    I want to treat these in the most professional way possible. Was thinking of sanding them right down to the bone and the respraying?

    I was thinking of also possibly sanding down the metal under the wheelarches (where it isn't visible) and maybe putting some underseal? or waxoyl? or hammerite?

    was also thinking about hammerite for the battery tray?

    I'd really appreciate any suggestions and if anyone could share past experience with treating a similar problem.

    Thanks guys,

  2. NW_Merc

    NW_Merc Banned

    Sep 3, 2005
    Over here, sometimes over there
    1994 Mercedes C180 classic
    Apparently there's a treatment called POR-15 which helps stop or prevent rust....
  3. lynall

    lynall Hardcore MB Enthusiast

    Jul 31, 2008
    The silver one.
    Google bilt hamber i think thats how its spelt!

  4. BillKat

    BillKat New Member

    Aug 28, 2008
    '85 280SE
    POR-15's good if messy to use, goes over rust happily - remove loose stuff as usual, wire brush or whatever suits. Doesn't like smooth metal - needs something to bite on. Can't remember now but got a feeling if it's to be topcoated, it needs it's special primer - could be wrong there though.
    Or zinc primer, then normal primer + topcoat maybe. Depends how bad it is and how smooth a finish you want. On the external stuff, if it's a metallic, any touch-up will be probably be visible.

    Going to try Eastwoods 'Rust Encapsulator' primer on mine when I do my sills, and then primer and top-coat over that.

    Bilt-Hamber stuff is excellent at rust removal; there's a water-soluble powder for soaking, and a gel for when soaking's not poss. I use the gel, it really does a good job but needs 24hrs covered in plastic wrap.

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