Consistent Airflow

For a consistent and proper spray pattern with your spray gun or airbrush, you need to have a consistent airflow.  If the flow fluctuates, the spray will as well.  When air is discharged from your sprayer, it draws from the compressor.  As the level draws down, the compressor kicks on and charges the tank back up and subsequently the pressure.  This fluctuation is often a wide pressure range and contributes to inconsistent and poor sprayer performance. 

Using two air regulators is a great way to remedy this.  Station the first regulator at the compressor and regulate it high.  Something like 80 psi will work well.  Place the second regulator before the airbrush or spray gun.  Typically on or next to your spray area.  This regulator should be set at your desired working pressure such as 35 psi.  When the air is discharged, the pressure will draw down from the 80 psi regulator but maintain 35 psi at the nozzle.  Once the first regulator draws down far enough, the compressor will kick back on and re charge it like before, but 35 psi will be continually maintained at the nozzle.