In the automotive spray painting industry, it is very important to select the caliber of the paint spray gun. We need to know what caliber of the paint spray gun we have? Generally, 0.3-1.3 are repair guns, and 1.3-1.5 are topcoat guns. Traditionally, 1.5 is the standard, and 1.7 to 3.0 are suitable for large area / primer.
So generally speaking, the diameter of the spray gun for spraying automobile paint is 1.3-1.7, but the specific depends on the spraying product. Large diameter is used for large area, and small diameter is used for small area. If the area is large and the paint thickness is required to be high, airless spraying equipment is recommended