Conventional spray gun is the common type of sprayer that uses compressed air at fairly high pressure. It atomizes finish by forming it into tiny droplets, mixing the droplets with air, and propelling the mist in a pattern toward the wood. It can tackle any type of finish, thick or thin. It operates from a standard air compressor. The conventional spray gun works by the following process: gel coat is pumped through the fluid nozzle, then after exiting the nozzle, the resin is caught and mixed in a turbulent air stream. The catalyst is sprayed into this air stream so that it mixes with the resin. One of the benefits of this gun is that it allows good control over the spray pattern.