Prevention:
1. Thoroughly clean the areas to be painted before and after sanding. Ensure all surfaces are dry before applying coatings. Avoid touching the cleaned area with your bare hands to prevent skin oil from contaminating the surface.
2. Select the thinner or reducer most suitable for existing shop conditions.
3. Allow proper drying time for undercoats and topcoats. Be sure to let each coat flash before applying the next coat.
4. Drain and clean air pressure regulator and drain air compressor tank daily.