>>939386599% of time after i apply my pigments I fix it on place using isopropyl alcohol from pipette or just taking some on brush and letting the capillary effect do its job.
And this is on top of Tamiya or AK real colors, on which i use the same isopropyl alcohol to thin when airbrushing. And this with no coats of varnish between them.
Works fine for me, and hasnt caused any accidents.
You people need to stop worrying about these ridiculous side effects and just get on with it because nothing ever happens.