What are the procedures involved in the coating application process? And what are the acceptance criteria after the coating application?

1. Conduct on-site inspections and cleaning to check if there are any dust, oil stains, or impurities on the base surface. Also, verify whether the base is solid and stable, if there are any cracks, whether it is flat and vertical, and whether it is dry. 

2. A properly treated base layer ensures the aesthetic and durability of the coating. Common problems include cracking of the putty layer and coating layer due to base layer factors (such as cement mortar or wall cracks). Treating cracks in the base layer with bandages is a common method for interior wall coating construction. If the original white-coated wall uses inferior glue, it should be strengthened with an anti-alkali primer. Any powdering on the wall surface should be removed. 

3. The wooden panels should be sealed to prevent deformation and discoloration of the surface. 

4. Patching and bandaging: Ensuring the smoothness and firmness of the interface around the patch is a crucial point in the patching process. Applying two layers of bandage can reduce the occurrence of cracks in the coating layer. 

5. If the flatness of the local area after sanding the base layer is insufficient, it is necessary to first apply putty to the uneven parts to level it out; however, if the flatness deviation of the base layer exceeds 8mm, putty cannot be used to make up for the thickness to level it; instead, cement mortar should be used for treatment and leveling. 

6. Smooth out and sand the putty to ensure that the base surface is roughly level. 

7. For the first coat of full-grain putty application, efforts should be made to ensure that there is no exposed base, no missed areas, and no visible joint marks. 

8. The second coat of putty should be applied in two layers. The work should be completed after both layers are applied. The time interval between each layer of putty application should not be too long. The thickness of the putty should be 1 to 3 millimeters. 

9. Corners* Ensure that the corners are straight and form a straight line. 

10. When there are strict requirements for the flatness of the wall surface, an additional layer of putty can be applied during the third coat of application. However, the thickness of the final coat of putty after sanding should not be less than 0.8mm. 

11. When fine-grinding the coating, a high degree of flatness is required for the putty layer. During the grinding process, it should be done to achieve a smooth surface. The putty layer should not be too hard to avoid the situation where it becomes overly smooth after being ground, lacking any fine sand marks, which would be unfavorable for the adhesion of the coating to the putty layer. 

12. The primary function of the first coat of base paint is to resist alkali and seal the surface. It also strengthens the putty and covers minor scratches. Therefore, the first coat of paint should ensure that the putty layer is fully absorbed by the paint. 

13. During the sanding process of the putty, the putty layer begins to peel off. When sanding the holes, reapply the putty after the first coat of paint has been applied. 

14. If there are any marks left after applying the leveling and patching putty, they should be smoothed out to prevent any disruption to the overall integrity of the coating. 

15. For the second coat of the base paint, in order to ensure the painting effect of the top coat, the total thickness of the base paint should be 30mm. One should not try to save time and materials by applying only one coat of the base paint. 

16. If the leveling property of the base coat is insufficient, it is necessary to sand it properly before applying the top coat to ensure a smooth finish on the surface coat.