There are several key factors that need to be combined to use electrostatic weapons effectively. First of all, you should choose the right SATA spray gun technology based on your application needs. 

There are several electrostatic SATA spray hardware technologies to choose from. The oldest and perhaps the most common is the electrostatic air SATA spray gun. This weapon uses compressed air as the main and only means of spraying the coating. 

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This weapon is most commonly used in applications requiring a Class A automotive coating. The weapon provides a lot of control over the weapon, e.g. liquid flow with liquid needle adjustment knob and fan control with an adjustment knob. 

In addition, the amount of fluid can be controlled by how far the operator pulls the trigger back. This is called the "feather" of the gun. The primary source of fluid control is determined by the fluid pressure from the low-pressure pump, the air entering the pressure vessel, or the fluid regulator installed near or in the spray booth. The viscosity of the coating and the size of the fluid nozzle also affect the fluid flow. 

This is due to the potential use of high air pressure to atomize the coating. Using high air pressure can prevent electrostatic attraction by forcing charged paint particles through the area or creating excessive reflection or spraying. You can even search online for more information about SATA spray guns.