In this way, are electric paint sprayers any good?
Because there's no air, a lot more paint comes out of the spray tip. If you don't mind the noise, need to paint large surfaces quickly, and don't want to mess with thinning the paint, then an airless sprayer is a good choice. For less overspray and a finer finish on interior projects, HVLP is a better choice.
Consequently, how does a spray gun work?
Spray gun. Spray gun, painting tool using compressed air from a nozzle to atomize a liquid into a controlled pattern. The spray nozzle operates by impinging high-velocity turbulent air on the surface of filaments or films of liquid, causing them to collapse to droplets with a wide range of sizes.
As long as you're into taping sheets of plastic on the walls and you've got a bottomless budget for paint, a sprayer is worth considering. It has its strong points, but it's not a truly practical replacement for the old brush and roller.