What Causes Small Bumps After Car Painting?
2 Answers
Possible reasons include poor quality of the powder coating itself or improper operation. Below is relevant information: 1. Introduction: Car painting refers to applying a layer of paint on the car's surface to protect it. Car painting generally uses baking paint. In automobile manufacturing plants, after the frame and body are welded, the next step is painting. 2. Classification: Types include standard paint, metallic paint, and pearl paint. The car painting process includes applying putty, sanding, and painting. Car painting encompasses: standard paint; metallic paint; pearl paint; clear coat; matte paint. 3. Composition: The makeup of car paint. Car paint generally consists of four basic components: film-forming substances (resins), pigments (including extender pigments), solvents, and additives.
I noticed small raised bumps appearing after car painting, which are usually caused by poor environmental control during the painting process. Dust or small debris falling onto the wet paint surface can mix in and form small raised particles. Sometimes, high humidity causes bubbles in the paint layer, which solidify into bumps. I encountered this issue when painting my own car—the garage door wasn't closed tightly, allowing outside dirt to get in. To fix it, you need to sand the affected area smooth and apply a fresh coat of paint. Prevention is straightforward: thoroughly clean the car body before painting and ensure the workspace is clean and enclosed; choose dry, windless weather for painting; and let the paint dry slowly after application, avoiding any contact. This not only prevents bumps but also saves the hassle and time of rework. In daily maintenance, paying attention to the car's parking environment and avoiding pollution sources can also reduce similar risks.
