On Tue, 30 Nov 2004 00:11:28 GMT, Lucas Tam >
wrote:

>> It's rust.
>>
>> Lack of driving is what does it. Very common, especially in Northern
>> US states and southern Canada. The absolute worst is when you drive
>> the car in the snow or rain, then park it in a garage. That salt-laden
>> moisture then takes a long time to evaporate and munches away at metal
>> like crazy.
>
>I did notice the rust build ups... I used to go away to school during the
>week and I would leave my car at home. On the weekends I would notice a
>thin layer of rust - and after driving the rust would be gone. I didn't
>think much of it at the time, but I did wonder how much material was being
>stripped away and the effects on the car... I guess I now know.

Rust doesn't happen when its cold. All chemical action slows down at
low temperatures. The rusting occurs as temperatures rise above
freezing. Heated garages are murder on cars that have to drive on
salt-laden roads. Leave it outside if you can.