Future works great but "There is no free lunch". If you're using Future floor polish to thin paint, one thing you don't want is dried paint inside the airbrush. Future is formulated to wear well on floors, and so it's tough stuff. I rinse out my a/b and backwash the tip after every paint shot but like most, I'm not always good about cleaning the whole brush after a painting session. I've sometimes left paint back in the barrel of the a/b around the needle packing. When that happens, the next time I use the brush, the trigger is stuck solid and will not move backwards because the Future set so hard in the barrel that it glued the needle in the packing. Takes needle nose pliers to rip the needle out of there! So do a very good cleaning before you store your a/b, if you use Future.
The more volatile the solvent you use to clean an airbrush, the faster it works. Acetone works better/faster than most.