What Causes Uneven Paint Absorption on Surfaces and How to Adjust Spraying Technique?

Uneven paint absorption is a common issue in automotive refinishing, especially when dealing with mixed substrates or poorly prepared surfaces.

1. Surface Preparation Issues

Absorption inconsistency often starts before spraying:

• Uneven sanding grit

• Contaminants (oil, silicone)

• Inconsistent primer application

2. Spray Technique Factors

Improper technique amplifies the problem.

Key adjustments:

• Maintain 15–20 cm spray distance

• Keep consistent angle (90° to surface)

• Overlap passes by 50%

Using an air spray gun incorrectly often results in dry edges and heavy centers.

3. Control Material Application

• Apply light tack coat first

• Follow with medium-wet coats

• Maintain wet edge

The LVLP Spray Gun Sealed-Strong, Pressure-Stable helps maintain uniform atomization across passes.

4. Environmental Factors

• Temperature affects drying speed

• Humidity affects solvent evaporation

• Airflow impacts overspray

Conclusion

Uniform absorption requires both proper surface prep and controlled spraying technique. Small inconsistencies quickly become visible defects.