El Taino:
My point being, just because Tamiya Acrylics work with LT, doesn't necessarily means that all of a sudden is a Lacquer paint disguised for years as Acrylic. The dusty effects has to do more with working pressure and distance from the subject being sprayed than thinning agents alchemy. Just my 2 cents as well.
From what I understand, Tamiya's are labeled an "acrylic lacquer", whatever that means! And I know for a fact they label their rattlecans as "synthetic lacquer".
Re: the dusting, I'm very certain that environment plays a role, too. I LOVE the way Tamiya paints airbrush, but this summer they've given me nothing but headaches. Every flat paint has dusted to a comical degree, no matter how thin I go, how close I get, or how I adjust the PSI. I think it's just too friggin' hot (garage is usually hovering around 90-95 degrees when I paint right now) and the atomized paint is cooking.