[MPWR]

The problem is very likely that you are either spraying at too high a pressure or that the paint is not thinned enough. These problems can be just as much an issue for laquers as acrylics.

This is perhaps simplified, but to get paint to go on smooth you want to apply it-

at the lowest pressure it reliably atomizes at,

as thinned as possible before it runs,

in light to medium, even but not wet coats.