Using rubber cement to mask entire areas, or to mask irregularly-shaped areas to simulate chipped, worn, or scuffed finishes. First, a base-material color (such as aluminum or steel) is applied in the desired area. Then rubber cement is applied over that area in a stippling or stabbing motion. After the rubber cement dries, the top color is applied and allowed to dry. Then the cement is rubbed off, exposing the color underneath.