Create and design a website, if you haven't got design skills then pay someone to do it.
Advertise on Facebook
Advertise and target websites, companies and people that have relations to cars/car body work, and ask them to affiliate with you.
Word of mouth
and the most important one, to have a USP and the correct skills for the business your advertising.. any company can get customers or even potentional customers.. but will they come back? that depends on how well your company sells the product to the customers.
