What is the coat of wax? It is a clear protectant for the painted, chromed and almost all the areas of the car. There are so much harm to your car out there such as UV rays, ozone, tree sap, road tar. You don't want these harm to attack your car. A coat of wax can help. A good coat of wax will also add the depth of shine to your car.
Sometime when you wax your car, you may get cloudy wax to your car. Why? One of the reasons can be you apply the wax to unclean surface. If you apply the wax to a pile of rubber, it will not make it shine. So it is important to clean the surface.