How to Repair Cracking Paint Putty?

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To repair cracking paint putty, you need to scrape off the cracked putty and reapply the paint. This process should be handled by a 4S shop. Below are several methods to prevent paint putty from cracking: 1. Quality requirements for body filler: When selecting body filler, choose high-quality products. Low-quality body filler has lower hardness and viscosity, making it difficult to adhere effectively to the car body. 2. Proper use of body filler: When using body filler, avoid diluting it with solvents like thinner, as this can easily lead to cracking, bubbling, and denting of the paint. 3. Techniques for applying putty: The putty layer should not be too thick, as thick layers are harder to dry and have poorer adhesion. Additionally, after applying the putty, wait until it is completely dry before painting. Painting over wet putty will result in poor paint quality.