Dust as in the shiny flakes of hawtness? or dust like dirt in the air?
Yeah thats the idea. with metallics and pearls you need 100% even coverage or it will have dark stripes from the heavy overlaps. I try to shoot large flat panels in a X pattern, not a bunch of parallel coats. same concept as block sanding to keep a flat surface and avoid sanding scratches. Lots of light coats to completely fill it in solid.
then the dust coat when it still tacky sorta drops the flakes and paint on the semi wet surface. Turn up the pressure on the gun, dial in the fluid mixture and widen the fan adjustment… leaning out the mixture. The paint dries in the air and falls on the semi wet surface. A lot like overspray. Too much of this will give you a heck of an orange peel come clear coat so be careful.
When I dust coat it, I actually throw the paint at it. Like a spatter paint, but with a gun instead of a brush. that randomizes the overspray even more.