Hi folks,

I'm not sure if there's a more appropriate newsgroup for this question,
since it's not really Hyundai specific.  That being said, I recently
bought a 2005 Hyundai Elantra VE (5door) and have been thinking about
various rustproofing options.  I live in Ottawa, Canada, so winter driving
tends to involve plenty of snow, slush, and salt - a nasty combination for
rust.

Various garages around town offer everything from a straight underbody
spray, to drilling holes all over the place to inject rustproofing
compound into every crack and crevice in the car.  My question is:  Does
any of this actually work, and if so, what is the best option to choose?
Most rustproofing places offer 'guarantees', but they are all guarantees
against PERFORATION by rust and only valid if I come back every year to
get the rustproofing redone.  To me that's a pretty useless guarantee -
I'm not going to let a spot of rust sit around long enough to completely
rust through the metal... I want my car to be rust-FREE for as long as
humanly possible.

Any advice?  I'm really hesitant about letting someone drill holes in
panels to inject rustproofing compounds... it seems to me that would
INCREASE the chance of rust by providing an opportunity for moisture to
get in when it otherwise wouldn't be able to.