Common paint has no standard, it should be visually measured, with full brushing and no sag, no leaking brushing and spraying.
there is no specific criteria. no matter what kind of painting you are sparying, you can not brush until the treament of coating surface, otherwise there is no way to guarantee quality. brushing by hand for 2 - 3 times. Simple brushing needs at least two sides, if advanced brush need to be able to see the film thickness, it would need the N side. brushing until you are satisfied, pay attention to the quality of spraying, and pay attention to environmental protection
