Imported and domestic spray guns should not be judged only by price, brand, or appearance. The real difference is found in air cap precision, needle-nozzle matching, internal passage quality, trigger control, sealing durability, and repeatability after cleaning. This article provides a practical evaluation method used by experienced painters.

High temperature changes coating viscosity, solvent evaporation speed, compressed air behavior, and gun body temperature. These factors can cause atomization turbulence even when the spray gun setting appears unchanged. This guide explains how to stabilize the gun, coating, and air supply system during hot-season production.

Different coatings require different nozzle behavior. Matte paint needs stable film thickness and controlled gloss, metallic paint needs even flake orientation, and clearcoat needs smooth flow and sufficient wet film build. This guide explains how to select nozzle size and adjust spraying parameters for these three coating categories.