Prepare a mixture of mild soap and water. Wash the areas that you want to paint with this mixture. In order to get rid of stubborn grease stains or car wax, you may have to wash the areas to be painted with grease and wax remover.
Neutralise the car’s body by grounding it in order to get rid of any electric charges accumulated on the chassis. Attach one end of a copper wire to the car’s chassis and the other to a grounded object. It is important to ensure that you are working in a dust free environment.
Lightly sand the areas to be marble painted. Keep sanding until you reach the metal surface. To prevent adjacent areas from being painted, cover them with masking tape. You may want to cover the areas that you do not want to paint with a piece of paper and then tape down the paper with masking tape.
Apply a coat of automotive primer to the designated areas. Allow the primer coat to dry completely and then sand it until it is fully smooth. Sand lightly because if you sand down all the way to the metal layer, you will have to apply another coat of automotive primer.
Spray the designated areas with dark-hued, urethane-based car paint in loosely connected swatches. Use a spray gun for this purpose. Let the paint dry before moving on to the next step.
Spray medium-hued paint to connect the loosely connected swatches from earlier step. Allow the medium-hued paint that you just sprayed to dry.
Create white veins by spraying white or cream-based car paint on the designated areas. This will give the paintwork a more realistic look.
Finally, apply two to three layers of clear coat. Let first layer of clear coat dry before applying the second layer.