Interior painting involves applying paint to the walls, ceilings, and trim within a building to enhance aesthetics, protect surfaces, and personalize spaces. This process typically includes surface preparation, such as cleaning and priming, followed by the application of paint using brushes, rollers, or sprayers. The choice of color, type of paint, and finish can significantly influence the ambiance and functionality of a room. Professional interior painting aims for a smooth, even finish and long-lasting results, often requiring multiple coats and careful attention to detail.