Hurry in before winter starts for the best protection: 75 layers of Zaino. :lol
Winter is cold you car needs a heavy coat.
You would not go outside on a cold winter day without a heavy coat, so why should you car go with out.
Do not let your car get frost bite this year.
Call me before winter to protect your investment.
Set up a winter protection plan today.
Do you plan on keep your a car little longer, call me I can help you keep your car looking new longer.
Protect your car against the ravages of winter.
Wax on, wax off for winter protection
Wax on, Wax off for a shiny car this winter.
Help prevent rust.
Do your part to help prevent rust
Just a couple of hours today can...
Help make (add your location) a better looking place this winter one car at a time.
The sun may not shine for long during the winter months, but your car can shine all the time.
One of the local carwashes here usually has billboard during the winter which reads give salt the flush or flush salt out today. Or something along those lines.
The one mentioned by the other posters are simple and effective.
Eric