What Causes Uneven Paint Finish After Car Painting?
2 Answers
The reasons for an uneven paint finish after car painting are: 1. The car body surface was not properly cleaned before painting; 2. The air filter was not replaced; 3. The paint booth air pressure was too low; 4. The painter wore incorrect or unclean clothing. Preventive measures for an uneven paint finish include: 1. Ensure the car body is cleaned with detergent and wiped with a tack cloth before painting; 2. Regularly inspect or replace the filter; 3. Wear lint-free work clothes; 4. Maintain proper paint booth conditions. Remedial measures for an uneven paint finish are: 1. Lightly sand and polish the affected area; 2. Sand the entire painted area, clean it with silicone remover, and repaint.
I often do my own painting, and I encounter quite a few issues with uneven paint surfaces. The most common reasons are improper spray gun distance or angle—spraying too close causes paint buildup, while spraying too far results in uneven coverage, leading to inconsistent thickness. Surface preparation is also crucial; if dust or grease on the primer isn’t properly sanded off, the paint won’t adhere well. Another issue is poor-quality paint—low-end paints contain more impurities and may not mix evenly, resulting in a grainy finish. High humidity or low temperatures can slow drying, causing bubbles or an orange-peel effect. If the curing time after painting is insufficient, the surface may feel sticky. So, what’s the solution? Thoroughly clean the car body before painting, sand it carefully with fine-grit sandpaper, and choose a well-ventilated indoor environment to avoid humid conditions. Applying multiple thin coats is better than one thick layer. If problems arise, lightly sand the affected area and repolish, or seek professional refinishing. Paying attention to these small details can save a lot of trouble.
