It depends on what you want to do.
10 years ago I used an Oldfields electric sprayer to paint the outside of my house with water based (acrylic) paint which did an excelent job. This was their best model (not cheap) and uses a small, built in piston pump to atomise the paint. Much quicker than using a brush or roller. Recently I had to paint a wooden fence and the old sprayer did not work so bought one of the new cheaper sprayers. This one used a built in fan to atomise the paint (like the sprayers that used to come with a vacuum cleaner). It did not produce a fine mist but did an excelent job of painting a rough sawn timber fence with acrylic paint.
I would not use an electric sprayer for applying car quality paint and lacquers and use an air compressor spray gun instead.
Paul.
Edited By Paul Lousick on 10/08/2019 22:59:30