basic reason for orange peeling is the drying speed.
if the gun is too near the surface, the paint won't dry enough and will run,
too far it will dry first and then cause problems.
thinner paint is always better than thick, and then work on how far from the surface that you need to be.
obviously the air temparature and humidity play a part too , but paint thickness and distance are the easiest things to learn first.
paul :wink: