PVA....Cannot live without it, cannot shoot the nozzle when it clogs....   Requirements: Patience aplenty Airbrush needle or something like that with a nice teeny tiny point.   Issues to overcome: When printing and humidity strikes midprint, especially on long ones like I do on a constant basis Humidity will clog the nozzle as PVA pops and crackles, creating a carbonized mess inside as well as outside the nozzle If you pause the print to try t