A drywall skimmed with pre-mixed plaster can be painted in less than 24 hours, depending on the ambient temperature and humidity.
There are a few plaster sprayers that have a peristaltic pump (a tube squeezed by rollers) which also requires compressed air to produce a spray.
These types of plaster sprayer can also spray textured coatings with particle sizes up to about 3mm diameter, providing that they are not solvent based.
Air operated piston type supply pumps can put out as much as 27 US gallons per minute (1.7 L/s).
Material supply hoses are medium pressure at about 600 pounds per square inch (4.1 MPa).