How does surface temperature influence coating application?

The influence of surface temperature on coating application is indeed significant, particularly regarding viscosity. Coatings typically behave differently at varying temperatures; as the temperature increases, the viscosity of the coating generally decreases, making it thinner and easier to apply. This means a coating may flow and level better at higher temperatures, potentially resulting in a smoother finish. Conversely, at lower temperatures, the viscosity increases, which can lead to application difficulties, such as uneven spreading or increased likelihood of defects like sagging or dripping.

The other options do not accurately reflect how surface temperature interacts with coating application. Lower temperatures may not necessarily enhance adhesion; in fact, they can often hinder it. Higher temperatures do not guarantee the prevention of all defects, as other factors are also involved. Lastly, it is incorrect to say that surface temperature has no effect; in reality, it plays a crucial role in the overall success of the coating process.