Every other coat as required should be sprayed 90 degrees from the prior application, as shown in Figure 9.
Figure 9 - Directional application of paint, 2nd coat - using a paint sprayer
The nozzle of the paint sprayer must remain perpendicular to the material being painted, as shown in Figure 10.
Figure 10 - Correct paint sprayer nozzle angle
If the nozzle is held at an angle, the lower portion of the area covered by the paint spray will receive a heavier layer of paint than the upper area, as shown in Figure 11.
Figure 11 - Incorrect paint sprayer nozzle angle
The paint sprayer nozzle should be between eight and 12 inches from the surface of the material being painted, as shown in Figure 12.
Figure 12 - Height of paint sprayer nozzle above material
- Poor paint sprayer maintenance:
Proper maintenance is critical, if you want a paint sprayer that performs. The very fine orifice, that is in the nozzle controls the flow of paint to the surface of the material being painted. Even the smallest of particles left over, in paint containers, hoses and nozzles, from your last paint project will have a negative effect the flow of paint through the nozzle. If it does not clog the nozzle completely, it will cause paint splatter and/or intermittent paint flow.
It is important that the paint sprayer be thoroughly cleaned after each use. Thinking that you can clean a paint sprayer properly prior to using it, rather than after using it, is a mistake, that will hurt the quality of your next project and could end up costing you money for replacement parts.
Follow the manufacturer's instructions for the precise cleaning method of that particular model paint sprayer.
Note: It is far easier to clean out wet paint then it is to clean out dry paint from the paint sprayer nozzles and accessories.