The present invention relates to a spray gun generally employed with a multi-functional surface cleaning machine having a fluid tank, a pump, a dispensing device, and at least one receptacle for holding concentrated cleaning chemicals. The guide element transversely to the longitudinal axis has on the underside a foot part, which on the first end of the guide element has a base plate. Beneficially, the production of these coatings is achieved without the use of organic solvents.