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Is it because there is no drying, if the drying moisture is below 12, and then planing and leveling, most of the wood should not have subsidence. It may also have something to do with the material of the wood, which seems to be the case with pine.
Find a furniture buyer to give you a phone call, they can repair the paint like this.
It may be that the paint surface is not completely dry, or that there is a problem with one of the painting processes. >>>More
Wash a split surface immediately and re-spray it, or wait for it to dry completely and then sand the damaged surface, and protect the intact area, and re-spray, hopefully.
It is possible that the caliber of the gun is not adjusted well, or the air pressure is not enough. Debugging required. The viscosity of the paint depends on whether it is appropriate, and the thinner can be added more, if it is too thick, it is easy to clog the spray gun.
The main reason for the spray flow is that the ambient temperature of the spray paint is low, the drying speed of the thinner curing agent of the spray paint is slow, and the interval between the spray paint is short. I hope my answer helps you.