Does the Wagner model 0518050 paint sprayer, spray lacquer?

You can use the Control Spray Double Duty to spray a water-based lacquer. However we do not recommend it to spray solvent based lacquers. They are a harsh material that will damage the seals of the sprayer and cause it to leak and wear prematurely. On top of that, lacquer and lacquer thinner will have flashpoints below 70 degrees which can be hazardous. Nothing with a flashpoint below 70 degrees should be used with the Control Spray Double Duty.