The right spray gun size depends less on the size of the gun body and more on the fluid tip, nozzle opening, and spray pattern. For most automotive paintwork, a 1.3 mm or 1.4 mm tip works well for base coat and clear coat. Thicker materials, such as high-build primer, often need a 1.7 mm

A rotary atomizer and a spray nozzle both break liquid paint into small droplets, but they do it in very different ways. A rotary atomizer spins a bell-shaped cup at very high speed and throws paint from its edge. A spray nozzle forces paint through a small opening, often with fluid pressure, compressed air, or

Atomizers can develop clogged passages, uneven spray patterns, poor droplet breakup, dripping, pressure loss, excessive overspray, material buildup, vibration, and premature component wear. Most of these problems come from contamination, incorrect air or fluid settings, worn parts, unsuitable coating viscosity, or weak maintenance routines. The good news is that many atomizer faults give an early

Atomizers turn a continuous liquid supply into droplets, but they do not all create a spray in the same way. Some force liquid through a small opening. Others use compressed air, fast-spinning cups, ultrasonic vibration, or an electrical charge. The main types of atomizers are hydraulic, pneumatic, airblast, air-assisted airless, rotary, ultrasonic, and electrostatic atomizers.

A rotary atomizer works by feeding liquid paint into the center of a rapidly spinning bell-shaped cup. The spinning surface spreads the paint into a thin film and drives it toward the outer edge, where centrifugal force breaks it into thousands of fine droplets. Shaping air then directs those droplets toward the part, while an

Buying an HVLP spray gun can feel strangely personal. Painters argue about them the way mechanics argue about tool brands. One person says SATA is the only serious choice. Another trusts IWATA because it lays clear with a softer feel. A garage painter may say a $150 kit worked fine on a project car. A