When spraying,   the amount of paint is too large, the spraying distance is too close, and the   spraying pressure is too large.

Choose a nozzle with a suitable 

caliber, and adjust the 

appropriate air pressure, spraying  distance, oil output and spraying speed according to the paint 

requirements.

Uneven paint blending, and paint   viscosity is too high or too low.

Use after mixing thoroughly, and adjust the amount of diluent 

added reasonably.

The coating is too thick.

Reduce the oil output of the spray gun to speed up the spraying 

speed and reduce the number of spraying.

Dry the newly   sprayed paint layer or force it to dry too quickly.

Extend the flash-off time.

The drying speed   of primer and topcoat is inconsistent, resulting in a dry surface and no dry   inside.

The top coat is applied after the 

primer is fully cured.

PU coating   curing agent is added too much, and the drying speed is too fast.

Reasonably adjust the amount of curing agent added.