couple of things to mention. if the gun is brand new, do a small project with it before you spray the mast. they pack the guns with grease fron the factory and the first time you run material through there especialy something hot like marine poly, it will spit globs of grease on your stuff. learned that the hard way, gun puked on my hood in the middle of the paint job. paint a chair or something then clean her up proper and its ready.

as far as reduction, follow the destructions but stay on the lesser side, you can always add more(cap fulls at a time). test the spray pattern on some scrap material until you get the fan and material flow where you like it before you touch the mast. don't try to put a fat coat on and cover on the first coat, hit a light/med 1st coat, let it flash for 15 mins. or so then another medium coat to cover. whites useually cover real good, reds and yellows not so much. the main thing is not to run/sagg the material. your better off with several light coats than to drench it. don't forget beer...can't paint without it!