what causes vehicle paint after painting, drooping

what causes vehicle paint after painting, drooping

The occurrence of remnants of auto paint liquid running downward on the coating film is referred to as sagging. They are most commonly seen on vertical surfaces or in corners. Those that emerge on the vertical surface are generally curtain-like sags, while those that form on the corners are tear-stain sags. The following are the reasons:

(1) Excessive or inappropriate thinner is used, leading the viscosity to be lower than the standard construction requirements, and the automotive paint to fall and flow because it cannot be adhered to the surface of the object.

(2) The temperature in the construction environment is too low, the drying speed of the sprayed automobile paint is too sluggish, and the solvent is difficult to volatilize, resulting in an accumulation of too much thinner in the paint film and sagging. Winter has a high incidence of sagging, which necessitates extra care.

(3) Using the spray gun improperly. The likelihood of sagging will rise if the spray gun is too close to the surface being coated, it is moving too slowly, it is spraying too thickly at once, etc.

(4) There isn't enough time for the paint layers to completely dry after painting.

The following techniques can be used to stop car paint from sagging:

1. To ensure that the construction viscosity is within the process range, use the recommended type of thinner and mix the paint according to the recommended ratio.

2. Apply the suitable spraying technique and make the necessary spray gun adjustments.

3. Check the temperature of the working area and give appropriate time for drying.

4. If the paint on your car is somewhat sagging, wet sand the affected area with fine sandpaper once it has dried, and then wax and shine it. If the sag is substantial, the damaged area needs to be repainted after being sanded.