An HVLP gun, or High Volume Low Pressure gun, is a type of spray painting tool designed to apply coatings like paint or varnish efficiently. It operates by using a high volume of air at low pressure, which helps to atomize the paint into fine particles. This results in a smooth finish with minimal overspray, making it ideal for both professional and DIY projects. HVLP guns are commonly used in various applications, including automotive painting, furniture finishing, and industrial coatings. They are favored for their ability to reduce waste and improve control, allowing users to achieve a more precise application while minimizing environmental impact.