I keep considering this. But my cars a bit poo so will wait til I get a newer one!
The only downside is I suffer from SERIOUS road rage. Hopefully knowing my business is being advertised will calm this.
I think car wrapping is a brilliant idea, it ranges from £800 to £2000 which I didn't think was bad. And people pay FAR more attention to that than a bumper sticker, or a magnet to the side of your car.
I recommend having it EVERYWHERE on your car.
On the boot/back when your stuck in traffic. And bonnet (for people who check their mirrors) and the sides for pedestrians or roundabouts etc.