I just airbrushed a mix of 1 part turp-a-tine, 1 part automotive lacquer thinner (really hot stuff) and 2 parts regular ol' Testors flat aluminum oil based enamel. I airbrushed it as thick as an actual full coat not a dust coat. Basically, the thickness of it could qualify as the final coat.
I don't see any attacking of the plastic. One of the test parts was a very old plastic model airplane fuselage and the other was fairly new Bandai model plastic.
I haven't tried this with a gloss model paint enamel yet.
The "thinner" of 1 part turpatine and 1 part lacquer thinner smells like watered down gasoline. I don't really know what chemical I might have created.
David Kennesaw, GA