What factors can cause an orange peel or pebble finish when painting?

The factors contributing to an orange peel or pebble finish when painting primarily involve the application technique and the conditions under which the paint is applied, such as gun setting, air pressure, paint viscosity, and the distance from the workpiece.

When the air pressure is too low, it can result in inadequate atomization of the paint, causing larger droplets to form rather than a fine mist that produces a smooth finish. Similarly, if the paint viscosity is too high, it becomes difficult to achieve a uniform coat, often causing it to dry unevenly and leading to a textured surface. Additionally, the distance from the workpiece affects how the paint lands on the surface; if the spray gun is too far away, the paint may dry before it hits the surface, resulting in a rough texture.

While incorrect paint brands, humidity levels, and the type of spray gun can also have effects on overall paint quality, the specific factors listed in this correct choice are most directly linked to the physical properties of the paint application process that create an orange peel texture. Understanding and adjusting these application parameters are crucial for achieving a smooth, professional-grade finish.