Will the original car paint bubble?

1 Answers
DeValerie
07/29/25 6:01am
Car paint bubbling is primarily caused by the relatively poor sealing capability of the intermediate coating. Even if there is moisture in the primer and intermediate coating layers, it can evaporate through the micropores of the paint film. However, the topcoat layer has stronger sealing properties, especially with two-component paints that fully cure. If moisture is trapped within the paint film, it cannot escape. Due to fluctuations in weather temperature and the expansion of underlying moisture, localized pressure builds up in the topcoat, leading to bubbling. The reasons for car paint bubbling include: 1. Poor paint quality: This often occurs in low-cost roadside shops that use inferior-quality paints to offer cheap services. 2. Substandard construction conditions and processes: Paint application requires strict conditions and high technical standards. The surface must be completely free of moisture before painting; the initial filling (putty) must be thoroughly dried in a controlled environment before entering the paint booth; the air hoses connected to the spray gun must remain dry, with no moisture allowed. 3. Excessive paint thickness: Carelessness during application or limited technician skills can lead to overly thick paint layers that sag. Additionally, improper polishing afterward can set the stage for future bubbling.
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