RE: Latex paint
one of the 'Old Timers' in our club uses latex paint and actually puts it on with a ROLLER, his plans are not any heavier then any other and he said it covers great the first coat.
for those who are spraying with those excessively high pressures if you'd thin it properly or use a larger needle/seat you'd save allot of weight and overspray. i do all my spraying with 20 psi both from my HVLP and cup gun and can get very smooth solid coverage with a 12-16 inch fan pattern, it also looses all the tendencies to leave the dry spray streaks.
kc