@DBT.....you shouldn't have a problem spraying the paint. What brush, paint, etc are you using.....are you backwashing after color changes? Your airbrush should have a nice spray of water with the needle removed as well as in place and ready for paint. I pull my needle out after each color. and wipe it with real fine sandpaper or fine steel wool. Shoot some water, put the needle back in and shoot the rest. It only takes a few seconds and i only have to soak my nozzle, etc. once every six months. You can't have any dry paint on the needle or nozzle. Hope this helps and this is what I find works best for me. I only use Auto Air,, Createx, Polytranspar and Wildlife, all water base