UV light, oxygen, fluctuating temperatures, humidity, and pollutants attack surfaces, substantially impairing their properties. Durable surface finishes therefore play a key role in customer satisfaction in the automotive industry, where large sums of money often change hands. One way of ensuring that the process economics are also right is to keep the number of paint layers down. There are many plastics coatings which do not require the use of prime coats or primers, but they are not always the best solution. In this overview we present a selection of binders for primers that are employed in multilayer systems. ...