A spray gun is a handheld tool used to apply paint, coatings, primers, or other liquids evenly onto surfaces by atomizing the liquid into a fine mist. It operates using compressed air, electricity, or high-pressure systems to ensure smooth, uniform coverage and a professional finish. Spray guns are widely used in automotive painting, marine maintenance, construction, furniture finishing, and industrial coating applications. They improve efficiency, reduce paint wastage, and provide a consistent, high-quality finish on metal, wood, plastic, and other surfaces.