How are different fluids used to operate the can of a spray paint?

Different fluids are not used to operate a can of spray paint. Spray paint cans are self-contained units that do not require additional fluids to operate. The propellant, which is typically a flammable gas such as propane or butane, is stored inside the can along with the paint. When the spray nozzle is pressed, the propellant is released and mixes with the paint, creating a pressurized mixture that is expelled through the nozzle.