Lacquer thinner used to thin Tamiya acrylics?

You shouldn't be using lacquer thinner to reduce Tamiya acrylics in the first place. Use 90% isopropyl. Clean the model surface before you paint. Then cleaning your airbrush with Windex (ammonia type) or just ammonia and water will be a breeze.

Tamiya acrylics do not have poor adhesion. I used them to apply camouflage to my hunting bow five years ago. It's still there, with no apparent wear in spite of brush, brambles, dirt, rain, and sunlight.

If ever you find your airbrush having some cured acrylic paint on or in it that will not come off with windex or ammonia, lacquer thinner will take it off.  Don't thin with it, but for a last-resort cleaner, it's a great solvent cleaning cured acrylics just as easily as it does enamels.

Andy