For all your airbrushing needs! Airbrush Medium — Creates a paint mixture that has just the right viscosity for airbrushing. Reduces clogging and tip build-up. Airbrush Medium is often used with Golden's Fluid Acrylics to create a fabric paint that does not require heat-setting. Transparent Extender — 100% acrylic binder increases transparency and film hardness with minimal tip build-up, clogging and surface defects. Not for use on fabric.