2. When spraying, the distance between the nozzle and the wall must be well controlled, not too far or too close, otherwise the thickness and quality of the coating will be affected. The thickness of spraying is based on the fact that the coating does not fall or slip.
3. The nozzle should be perpendicular to the wall, so the spraying effect is the best. The way of moving should follow the spiral trajectory, and attention should be paid to adjusting the spraying air pressure.