TH   GB
Nippon Paint
Paint and Coating Consultant

Industrial Paint   

Automotive Paint   

Exterior Paint   

Mottling
Mottling
Mottling
Causes
1.Too low viscosity
2.Too slow-drying
3.Too-high flow rate of the spray gun causes sagging
4.Distance between spray gun and surface is too close
5.Too low pressure spray gun

Solutions
1.Adjust the viscosity according to the specifications of paint. Always follow painting condition instructions.
2.If the proper thinner is used, the cap of the thinner container may not be fully closed and some thinner mixture is evaporated.
    - Avoid using thinner that is not recommended by paint instructions as the compounds may not match the paint used.
3.Reduce flow rate gradually until a desired paint film is achieved.
4.Average distance between spray gun and object is 1 feet. Excessive distance will cause unsmooth surface and too fast-drying surface.
5.Gradually increase the air pressure until a desired paint film is achieved.