What is “flashing” in painting?

Flashing refers to the uneven sheen that can occur on a painted surface, often as a result of variations in texture or differences in the application method. When paint is applied, different areas of the surface may absorb the paint differently based on their texture or the way the paint was applied, which can lead to a mismatch in shine or gloss levels.

This phenomenon can be particularly noticeable when a surface has been painted with varying techniques, such as brushwork, rolling, or spray application. Each technique can leave behind a unique finish, which may reflect light differently, creating inconsistency in the overall appearance of the paint job. Understanding flashing is essential for painters to ensure a consistent and professional finish across a surface.