How does excess film build typically present itself?

Excess film build refers to an excessive thickness of the paint or clear coat on a surface. This situation can lead to various issues in the finish, primarily contributing to the cracking and peeling of the paint. When too much paint is applied, the layers can become too thick to properly adhere to each other and the substrate. As the paint dries and cures, stresses can develop within these layers due to factors such as temperature changes, leading to a failure of the bond. This results in visible cracking and eventually peeling, where sections of the paint begin to lift away from the surface. Recognizing this issue is crucial for ensuring a durable and aesthetically pleasing finish in automotive painting and refinishing.