What Causes Paint Bubbling on Cars?

[VonAnthony]

Paint bubbling on cars can be caused by poor paint quality, applying topcoat before the primer is fully dry during repainting, or rust formation on the underlying metal due to moisture. Untreated paint bubbles will affect appearance, gradually expand in size, and eventually lead to paint cracking and peeling, which may damage the car body. The causes of paint bubbling include: 1. Poor paint quality - This issue frequently occurs at roadside repair shops where lower prices often indicate inferior paint materials that may cause problems after application. 2. Applying topcoat over wet primer during repainting - Moisture trapped between the topcoat and body filler can evaporate under high temperatures, creating air pockets that cause paint bubbling. 3. Rust formation on the underlying metal components due to moisture exposure. Treatment method for paint bubbles: The affected area should be scraped off, treated with rust prevention, filled with body filler, allowed to dry completely, sanded smooth, and finally repainted. If paint bubbling occurs due to paint quality or improper repainting, you may file a claim. It's recommended to have the issue assessed by professional technicians at authorized repair shops or 4S stores for proper handling.