There are a few things you need to know before starting to paint graphics on a car. First, the car must be clean and free of any contaminants. Second, the paint must be in good condition - it should be free of chips, cracks, or other damage. Third, the paint must be dry - if it is not, it will not adhere properly to the car’s surface and will eventually peel or flake off. Finally, the graphics must be applied in a consistent manner - if they are not evenly spaced out, they will look jagged and unfinished.