For best results when painting the walls of a restaurant; as a general rule, you should start by cleaning the wall of any dust or dirt that is stuck to the surface. Once the surface is dry, apply two coats of high gloss white paint before applying the final paint. When painting the walls of a restaurant, keep in mind the different types of paint that can be used and the type of surface; for example, Drywall requires a different approach than drywall or wood, so be sure to consult a professional before beginning your project.