You know, in Europe, specifically in the UK, there are a lot of services that prep the underside of your car for the winter. I know a few of them even come to the house to have the underside "sealed."

But in the US, I'm not sure if any suck service exists. I do know that they come to you house, jack your car up on stands and throughly scrub the underside of the car and treat it with waxes...

In most automated car washes, we have the "rust inhibitor" treatment... For the extra 1.50, you get the assurance that your car will never rust... Very funny.