If your company has a designated vehicle or fleet, adding graphics is an excellent form of advertising. Automotive graphics include decals and vinyl stickers that are fully customizable. They’re one of the most effective types of marketing within the out-of-home advertising (OOH) umbrella. Following Basic Design Principles. Select the proportions of the car based on car’s main purpose. Draw the rough shape of the car using straight lines and right angles instead of curves. Then, divide this block-shaped car into 3 or 4 squares, with 1 on top and 2-3 on the bottom.