The best mini HVLP spray gun matches your coating and your air supply, so check the tip size, cup size, working pressure and air consumption against the job. The KBS HVLP Mini Spray Gun has a 1.0mm tip, a 125cc cup, a 29 to 45 PSI working pressure and above 65% transfer efficiency, and it sprays water and solvent based paints, primers and clear coats.