There are two ways to get a smoother finish. 1). Turn up the pressure on the gun. 2). Add thinner as per the technical datasheet instructions. For instance, you could use an HVLP gravity fed gun with a 1.6-2.0mm nozzle set up. Add 15% urethane reducer when mixing RAPTOR. Set your gun at 2 bar. At a distance of about 15cm, spray the first coat as an even wet coat. After flashing, reduce the pressure and material flow to achieve a fine mist for the second coat.