1, the lacquer surface cracks: main reason may is because of the large temperature difference between the weather suddenly turned cold, resulting in different internal and external layer of the drying speed and table do not stem and the formation of cracks.
Field solution is to switch to small mouth spray gun, spray a thin layer of thin, try to control the drying rate of each layer, spray distance to a little far better.
2, lacquer into membrane in the process of cracks: at the time of spraying, coverage is not uniform enough or too thick, cracks in the surface coating film, even some Sha week after cracks.
This situation is to be specific analysis, in addition to the attention of the construction process, when necessary, should change the formula, re trial.
3 and an imitation stone yang angle crack: in the spraying process, sometimes in Yin and yang angle cracks, due to Yin and yang angle is two sides of the cross, if spray lacquer, in the drying process will the tension of two different directions at the same time to yin yang angle at the film easy to crack.
On-site solution: cracks were found in the Yin and yang angle, with the gun again thin spray coating, an interval of half an hour then spray again, until the cover the crack; for the new painting of yin and yang angle, at the time of spraying special attention not a spraying thickness, take spray thin multilayer method, namely after the surface is dry jet, far from the spray gun to, movement speed faster and not vertically Yin and Yang jet angle, can only take the scattering, i.e. spraying two face, let the mist flowers edge swept into yin and yang angle.