Paint finishes determine the sheen or gloss level of a painted surface once it dries. These finishes range from flat (no sheen) to high-gloss (very shiny), with satin and semi-gloss paints occupying the middle ground. The choice between these finishes can significantly impact both the appearance and durability of your walls. Semi-gloss paint is known for its high sheen and durability. It reflects more light than satin, creating a bright and vibrant appearance in a room.