Which factor is not beneficial when controlling the finishing process of aircraft coverings?

In the finishing process of aircraft coverings, controlling various environmental factors is essential for achieving a high-quality and durable final product. Temperature control is crucial as it influences the curing and adhesion of finishes; high or low temperatures can adversely affect the application and performance of coatings. Humidity control is equally important, as excessive moisture can interfere with paint adhesion and lead to issues such as bubbling or peeling. Proper ventilation is also necessary to ensure that fumes are dissipated and that the environment remains safe for the workers, while helping finishes to cure appropriately.

Excessive light, particularly ultraviolet (UV) light, can be detrimental by causing premature degradation of the materials used in coverings and finishes. It may lead to fading, cracking, or other forms of deterioration over time. Therefore, while temperature, humidity, and ventilation are beneficial factors in the finishing process, excessive light does not contribute positively and can actually jeopardize the integrity of the aircraft coverings.