And remember that lacquer is not like enamel, which sticks by the "bubblegum" principle. It depends on solvent penetration for adhesion, so it must hit the surface wet. Shoot too dry and it may not stick well.

Shooting with the gun closer to the surface (about 6 inches), or by adding a little more thinner, will help.

If the paint is not atomizing well, turn up the air pressure, and reset the spray pattern.

Are you shooting a solid or metallic?