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Rustproofing Operations

    From: R. Illig
    It was my impression that auto rust-proofing and undercoating was 
    an outdated concept.  I seem to remember reports of several years 
    ago which claimed that drilling holes and spraying 
    "rust-inhibiting" materials underneath and into auto cavities 
    actually caused more harm than good.  (Although I always thought 
    undercoating would be very useful.)  I believe these materials 
    often resulted in the attraction or build-up of moisture, a 
    condition which leads to rust and corrosion.  The use of steel 
    with better corrosion resistance, along with improved design, may 
    have helped to minimize the need for application of inhibitors.
    The last time I asked about getting my car undercoated (which had 
    to be at least 5 years ago), my Toyota dealer told me they would 
    no longer perform the service and recommended I do not waste my 
    time and money.
    The application of hazardous waste materials under the guise of 
    "in-house recycling", outside of the waste generating process, may 
    be stretching the intent of the regs a bit.