The brushing method is a construction method in which a brush dipped in paint is applied to the surface of an object. This method is easy to operate, easy to master, simple tools, not limited by the environment and site, and has strong adaptability to various surfaces. The disadvantages are high labor intensity, poor working conditions, low efficiency, poor smoothness and flatness of the coating film surface, and it is not recommended to apply fast paint, such as thermoplastic acrylic deep, nitro paint, vinyl paint, etc. Especially undeclared painting of art paint, such as hammer paint, orange paint, wrinkle paint, crystal paint, complex color paint and so on.
The spraying method is to use the airflow of compressed air to atomize the paint through the Spray Gun and then spray it on the workpiece.
The advantage is that it saves labor and time, and has high work efficiency. For workpieces with curves, concave-convex, and complex geometric shapes, it can be sprayed at places that are difficult to reach by manual brushing, and the coating surface is uniform, flat, and smooth.
The disadvantage is that it consumes a lot of materials, solvents and paints. It generally consumes 10%~40% more than brushing, and some even consumes as much as 50%-60%. One-time coating is thin, easy to sag, and it is easy to sag when spraying. The paint mist will endanger the health of the operator, and it is more likely to cause fire, explosion and other dangers than brushing. Therefore, it needs to be constructed under the condition of good ventilation facilities, which increases the construction investment.
