What can lead to a milky white appearance in lacquer-based paints?

A milky white appearance in lacquer-based paints is primarily caused by a phenomenon known as blushing. Blushing occurs when moisture condenses on the surface of the paint while it dries, leading to a cloudy or milky appearance. This typically happens in conditions of high humidity or when the paint is applied in temperatures that are too low, allowing water vapor to get trapped in the finish as it hardens.

The other factors, such as poor paint preparation, the use of low-quality brushes, and incorrect application techniques, can negatively affect the overall quality and finish of the paint. However, they do not directly cause the characteristic milky white appearance associated with blushing. Instead, they may lead to other surface defects or inconsistencies in the final coat but do not typically result in the milky effect seen specifically with blushing. Understanding this distinction is crucial for achieving a clear and professional finish in lacquer-based applications.