Should finishing problems occur, a careful investigation should be made for the purpose of determining the exact cause of the problem. Every factor that may have a bearing upon the finishing or coating operation from the wood or surface on through to the finishing coats should be taken into account. To solve problems, consider the following factors which impact the end result of your finishing operation. 

1. Type of surface.

 

2. Preparation of the surface.

 

3. Type and brand of washcoat or sealer.

 

4. Type and brand of stain or filler.

 

5. Type and brand of thinner used.

 

6. Percentage of material reduction for each coat.

 

7. Type and brand of topcoats.

 

8. Method of application.

 

9. Drying time between coats and method of drying.

 

10. Number of coats in each operation.

 

11. Mixing procedures of material prior to application.

 

12. Appearance of the goods in the package.

 

13. Shop conditions. 

a. Cleanliness.

b. Atmospheric conditions, shop temperature and humidity both in application area and drying area.

c. Knowledge of finishing practice.

14. The manufacturing dates, product identification numbers or reference and other identification marks stamped on the packages of the material in question.

The usual causes of trouble are: an unclean surface, insufficient drying time for each-coat, sealing in moisture, failing to stir the material thoroughly, and unfavorable shop conditions. Make sure the environmental conditions, ventilation, temperature and humidity are suitable to insure proper application. Check the spray equipment to make sure that the gun and compressor are working properly and that neither oil nor moisture is passing through the air of material lines.