Hi All am new to this site and need some expert advice please. I have bought a paint sprayer and want to do the ceilings in dulux magic white. The instructions say to dilute the paint so it flows through the measure cup at specific rates for each size. For example 150 seconds for the large spray nozzle. 5 minutes in and it still hasn’t drained So question is should I dilute it a little and see how it goes and is water okay to use