Guys,
1 little way i've found to advertise, without the cost of having the motor sprayed, as im sure a number of guys starting out cannot yet afford a van.
If the wife or some-one you know works in a office, it is highly likely they have a reprographics department.
If you have any business cards made then get them to send you the proofs via e-mail and print a copy off. Get the person from the office to get it enlarged to "A3" or bigger and get reprographics to laminate it (usually costs a packet of biscuits).
There you go free advertising - keep 2 copies in your car and every time you get out thats 1 on the dashboard - 1 on the back shelf. Place 1 in the window of any job you work on.