The Causes and Solutions of Dust, Particles and Pitting in HVLP Car Painting

After HVLP car painting, there are irregular small particle protrusions that are visible to the naked eye, and the surface of the paint film is rough and uneven when touched by hand. Many impurity particles appear on the surface of the paint film or are covered by the paint film.

Ⅰ. The causes of dust, particles and pitting after Hvlp car painting.

1. Dust, dirt or fibers from clothing, or impurities blown off from the edges of decorative parts and sheet metal joints, fall on the wet paint film when the car is painted.

2. Before HVLP car painting, the dust on the substrate surface was not completely removed.

3. When the car is sprayed or shortly after spraying, the particles floating in the air fall and sink into the paint film.

4. The container with paint or thinner is open or rusted, causing dust to be mixed into the paint without filtering.

Ⅱ. Prevention of dust, particles and pitting in HVLP car painting

1. Before HVLP car painting, make sure that the clothes are clean and dust-free, and blow off the dust on the edges of the decorative parts or the joints of the sheet metal.

2. Before the car is painted, clean the surface with detergent and tack cloth.

3. Keep the car painting room clean and dust-free. Sanding operations are prohibited in the spray booth. If necessary, the surrounding area and the ground of the spray booth can be moistened to ensure the normal operation of the air filtration system.

4. Keep all materials clean, seal the material container, and filter before use.

Ⅲ. Remedy for HVLP car painting with dust, particles and pits

First make the paint film fully cured. For slight dirt particles, use sandpaper to smooth and then polish. If the impurity particles sink deep or the paint film is synthetic resin paint, the paint film needs to be smoothed and then painted again.