Will the putty and paint applied at a 4S shop crack?
2 Answers
Normally, the putty and paint applied at a 4S shop will not crack. If cracking occurs, it means the repair was not done properly. If there are dents on the car, the auto detailing technicians will first pull out the dented area to ensure it is level with the surrounding surface. Then, they will sand it, apply putty, sand it again, and finally paint it after it dries. Since the paint thickness is uniform, skipping the putty application and painting directly will not smooth out the scratches, and the scratch marks will still be visible after painting, resulting in an uneven paint surface. The purpose of applying putty is to fill in the scratches, followed by two rounds of wet sanding to achieve a smooth surface, ensuring better smoothness and gloss of the paint after application. Applying putty is a crucial step to ensure the paint comes out smooth and even.
I've been handling car repairs for many years. Generally, the putty and paint applied by 4S shops are less prone to cracking, but it really depends on the specific situation. Their advantages lie in the high-quality materials, professional putty formulations that dry quickly with strong adhesion, and meticulous sanding before painting to ensure a smooth, impurity-free surface. Common causes of cracking may include applying putty too thickly without layering before rushing to paint, or high environmental temperatures leading to shrinkage cracks. If car owners aren't careful after repairs—such as exposing the car to intense sunlight or using high-pressure water jets during washing—problems can easily arise. It's advisable to choose a reputable 4S shop and have them use professional instruments to check the paint's durability post-repair. Regular waxing during maintenance can also help protect the paint. Don't opt for small workshops just to save money, as dealing with cracking later can be more troublesome.
