Nippon Enamel Paints are the type of paint that air-dries to a glossy finish and are used to coat surfaces that are exposed to extreme temperature changes, such as those that are outdoors. Enamel paints are the most common term used nowadays to describe paints that are intended to be used outdoors, or on the exterior. The term enamel, which refers to hard surfaced paint, are typically used to describe higher-end paint brands, highly glossy floor coatings, or spray paints.