Doesn’t the consistency depend on the type of airbrush you have? My airbrush has to be thinned down quite a bit or it won’t flow. Can I ask why distilled water? Why not just normal water? I’ve seen people use both so just curious
The issue with flow is not the airbrush. It’s the compressor.
If your airbrush is clean and your paint is not flowing at a consistency of heavy cream or slightly thinner, then the issue is your air compressor. You need at least 30 psi, but ideally more than 30, up to 60 psi. If you need to thin your paint to an unusually thin consistency to achieve proper flow, either your compressor is insufficient, your airbrush is clogged, or both.
Distilled water does not have minerals, which can compromise the integrity of the paint. Personally, however, I use ammonia for my thinning agent.
Also spraying too closely to the subject or over-spraying the area can cause this, you have to let each layer dry before re-working; gauge your distance accordingly, test spray on something first whether using canned spray or an airbrush.
Save yourself a lot of headaches and buy some specially made mask paints. Mixing your own is great for sponging but is a headache to get through an airbrush. Or maybe try rubber cement paint.
Or you could use the Night Shades
Just coming back to this after I brushed using acrylic and latex mixed together. I have a few bubbly areas itself; its because I put it on too thick in some areas. Since you’re using an airbrush, try applying it in thin layers any way you can (distance or maybe PSI) in layers until you get the solid white