Does painting a car on rainy days have any impact?

2 Answers
Quinn
07/24/25 2:49am
Painting a car on rainy days does have an impact, as the high humidity can prevent the paint from drying thoroughly. Even after prolonged baking, the paint surface is prone to gloss degradation. Here are some precautions regarding car painting: 1. If the car has just been painted, avoid exposing the freshly painted areas to water and dust. 2. It's best not to drive the car out on rainy days, as the fresh paint is still delicate and may develop unsightly watermarks that are difficult to remove, even with polishing. 3. It's advisable to park a freshly painted car in a garage overnight. 4. Avoid exposing the newly painted areas to chemicals and oil stains.
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VanKevin
08/10/25 10:22pm
From a technical perspective, painting a car on rainy days indeed has significant negative effects. High humidity makes it difficult for the paint to dry evenly, leading to surface bubbles or cracks, as well as poor adhesion. I’ve encountered this situation multiple times in repair work—customers who painted their cars after rain soon found defects in the finish. This happens because moisture in the air seeps into the paint layers, disrupting the chemical curing process. If forced to paint in humid conditions, a repaint may be necessary, wasting both time and materials while increasing maintenance costs. It’s wiser to choose a dry, sunny day for the job, ideally in an environment with humidity below 70%. This ensures a smooth, durable finish and avoids the hassle of rework.
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