How far from the surface are you spraying from? Sounds like the paint
(Future is really nothing more than a clear acrylic paint, and it's not
a wax) is drying before it hits the surface and that is commonly caused
by being too far away, try getting in closer, 3-5" away.
It may also be caused by insufficient air pressure, you don't say what Paasche you are using, but 15 psi is a bit low for most airbrushes, unless they are doing very detailed and fine lines. Turning up the pressure to 20 or 25 psi might be an idea.