RE: Need some help with spray painting
O have not used a hvlp gun but have used a few of the external mix guns and airbrushes over the past 40 years.in most cases the air pressure is set to the working pressure of the gun and the flow is adjusted to that pressure to give a nice mist and pattern on a test piece.a lot has to do with experience or practice and reconizing what causes the problems you are having.Badger used to put out a booklet about airbrushing that showed some examples and had you make adjustments to replicate them so you knew how the gun works and performs and what adjustments to make.orange peel usually results from paont not thinned enough,runs can be several things,paint to thin,volume to high ,not moving the gun fast enough or too close to the work surface.I have painted cars,pick ups and many planes and still am learning.with the change on paints over the years I will be using a hvlp gun on my next spray job