For Airbrushing: Most Acrylic colors will airbrush without thinning. With higher viscosity paints a thinning ratio of 4 parts paint to 1 part thinner is suggested. If more thinner is needed add slowly drop by drop. A rule of thumb is to "think to the consistency of milk." Fine line detail airbrushing requires practice and varies greatly with the equipment and air pressure being used. Experiment on a scrap before painting final project.
For use with Aztek, Testors, Model Master, Pactra and Floquil Pollyscale Acrylics.