I love this Air Brush gun. It's prefect for my cookie stencil work.
You can adjust the back end of it which will allow you to only pull the trigger back so far and it will stop. Under the cup you can adjust how much food coloring comes out of the gun by loosening or tightening the little valve underneath the cup. That way you don’t have to monkey with your airbrush compressor. I try and keep mine between 18 and 20 PSI.