Perfect paintwork can be achieved every time if the correct fluid tip setup has been selected for your spray gun. In the modern age, most vehicle refinishing professionals use high volume, low pressure (HVLP) spray guns. These are precision pieces of equipment that perform at their best when the fluid tip nozzle, needle and air cap are correctly chosen in relation to the type of paint material being used.
Always select an air cap that promotes full atomization of the paint material being used. Choose a size 105 air cap for thinner materials such as water-based paints, transparent sealers and blending thinners that require no more than 29 lbs. per square inch of pressure to achieve an effective paint flow. Select a size 110 air cap for viscous materials such as clear coats that require no more than 32 lbs. per square inch of pressure for application purposes. Remember that size 110 air caps are non-compliant, which means they can be used on non-HVLP spray guns to apply thick materials such as high-build primer.