70% Isopropyl Alcohol is a much better thinning agent for thinning your paint to run through an airbrush. As stated above, water based requires an higher air pressure and a heavier tip. I've been airbrushing for 25+ years and to this day, I hate spraying acrylics, won't do it unless i have no other choice. I usally find an alternative
HUGE SUGGESTION: practice on some scrap before you screw up your "show piece".
A lot of people spary acrylics and it can be done, but it takes practice and a lot of experimenting with materials and tools.
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