Will Body Filler Paint Definitely Crack?
2 Answers
Body filler paint does not necessarily crack; it depends on the skill of the bodywork technician and the quality of the filler used. Here are the specific details: Remedies and Reasons for Cracking: Normally, there is no remedy for cracked automotive filler; the solution is to reapply the filler directly. For repairing car dents, not only is filler application necessary, but the painting process is also crucial. Under normal circumstances, filler and paint applied at a 4S shop will not crack, as the staff will bake the paint at 200 degrees Celsius after application to enhance adhesion. However, if you attempt to paint the car yourself, achieving this baking step is difficult, making cracking more likely. Function of Body Filler: Body filler, also known as body putty, is primarily used to fill deeper dents, restoring the body surface to smoothness. It also ensures that the primer adheres firmly to the body. When repairing car dents, the first step is to apply body filler, followed by the final painting. Filler can restore damaged substrates to their original shape, offering a quick and cost-effective repair method. However, it should be noted that applying filler does not cover all aspects of bodywork repair. Durability of Body Filler: Generally, automotive body filler can last about 3 years. If the filler is applied too thickly or is of poor quality, its lifespan may be shorter, potentially leading to peeling in less than 3 years.
Body filler and paint don't necessarily crack—it all depends on the quality of the repair process. I've personally experienced many car repairs, and if low-quality filler is used or applied too thickly, or if painting is rushed before proper drying, cracks are likely to appear later. This is especially true in areas with significant weather changes, where thermal expansion and contraction make cracking more likely. Additionally, the surface must be sanded smooth before painting, and the primer must be properly applied; otherwise, poor adhesion can cause issues when the car vibrates. Good craftsmanship involves applying thin layers of filler, allowing each layer to dry completely before sanding, and then applying even coats of base paint and clear coat. I recommend choosing a reputable repair shop rather than opting for cheap solutions, as cracks not only look bad but can also lead to rust and structural damage. Overall, with professional handling, cracking can usually be avoided, so car owners shouldn't worry too much—but it's important to ask about the details.
