A smooth paint finish is a type of paint job that is characterized by its glossy, even surface. It is often achieved by using a SATIN paint, which is a type of paint that has a low sheen and is designed to provide a smooth, uniform finish. SATIN paint is often used in areas where a high-gloss finish is not desired, such as on walls or ceilings. It is also often used to create a more subtle look than a high-gloss finish.