Lacquer thinner is a very good cleaner- - - - -for everything but enamel. If you've been spraying various types of enamel (particularly with isocyanate hardener) try an initial cleanup with enamel reducer. The chemistry of cleaning enamel up with lacquer thinner just doesn't work.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!