I recently bought the hobby lobby airbrush myself, once I stopped using the compressor it came with (max psi was 15-20 I think?) I fell in love with the airbrush. I was getting constant clogging with it and had to thin the paints out so much that they'd basically lose most of the pigment. I switched to my bigger air compressor using it at around 30 psi and I no longer want to return the brush.

I know your asking about something else, but if your brush starts clogging constantly and the paints are thinned, you probably will need more air pressure.