I used a Graco ProX7 Hi-Boy airless sprayer set to 3000 psi (max) to paint ceilings in a rental property. Used Kilz ceiling paint from Home Depot which supposedly dries flat white. I overlapped roughly 50% on each pass. Not sure what I did wrong. Unlike my primary residence paint job, I did not back roll on this rental property and would like to find a technique where I can avoid back rolling ceilings as I've seen from painters on YouTube.
Initially, I thought the streaks were original paint showing through from under the Kilz so did a second coat which did not help. In the past, I've sprayed smooth wooden doors with great results after 3 coats of Behr semi gloss white so I feel comfortable using this sprayer. Also, this isn't a case where the tip was clogged or the pressure was too low giving those signature "tails."