What is the term for the uneven surface that can occur if paint is applied too thickly?

The phenomenon where paint is applied too thickly, resulting in an uneven surface, is referred to as runs or sags. When a coat of paint is too heavy, gravity causes it to flow, creating excessive buildup in certain areas, which leads to these noticeable imperfections. This is particularly common with liquids like paint, as they can naturally seek to level out. The result is an undesirable appearance that may require additional sanding and refinishing to correct.

Other conditions associated with paint application, such as "puddles," refer to localized areas where paint collects rather than being spread evenly. "Blisters" occur due to trapped air or moisture, which causes the paint to lift from the substrate. "Orange peel" describes a texture that resembles the skin of an orange, resulting from various application issues such as improper spray technique or inadequate surface preparation, but does not specifically relate to the thickness of the application like runs or sags do. Understanding these terms helps in diagnosing and preventing common painting issues in auto body repair.