Before you spray be sure to filter or strain your thinned paint. A lot of airbrush failures to spray is because of plugged nozzels. Or the it sprays then quits sprays and quits. To strain or filter my paint after thinning and mixing I strain it through a piece of panty hose I stole from the wife. I cut a square large enough to cover the top of the collecting jar and sag in the middle. The I just pour the thinned paint through the nylon and bingo no more airbrush problems for me. Sprays great no stoppages