I picked up a 1/5 hp compressor from Harbor Freight to test the sprayer with a constant pressure. I had to use like 4 different connections to get the dang thing from 1/8 npt connector to the existing connector I had installed (as you will see in the video). I was running at pretty low PSI (15-30). Overall I would say it is successful, it goes through quite a bit of liquid though (~10oz per minute) definitely lots of paint, on par with house paint sprayer. While spraying I put my hand about 8 inches from the nozzles and it felt like a pretty even distribution of spray, but my hand was dripping within seconds, which I am guessing will become and issue.

I also test it with 2% milk.....yes milk. From what I could gather 2% milk is similar consistency to paint-ready-to-spray and it made for a much cleaner test. I filtered the milk with 100 mesh filter, just to try and avoid clogging. It did ok, there was some dripping and it wasn't as consistent of spray as water but it still looked usable.

Overall I would say the testing was successful enough to move onto actually trying to paint an object. I plan to use diluted acrylic paint. I will it with basic shaped object plastic object and see how it goes.