That might work, Future is self levelling so you should end up with a pretty smooth finish.
I'm presuming you're using acrylics?
To prevent this problem in the future, make sure you drop the psi to the lowest your airbrush can use and get right up close to the model 1-2" away. This will help keep the paint from drying before it hits the model.
Since you're already using a retarder, try a bit more in the mix. Also, you can try lowering the amount of thinner. Most acrylic thinners use alcohol with exacerbates the problem.