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It is a fast-developing new type of filling material, which can adhere well to the surface of the object and does not produce cracks during the drying process. Mix the putty and curing agent evenly until the color is the same. Apply and scrape the matched products on the repair part, and try to smooth them. According to the damage, more can be applied. After drying, use sandpaper to grind the surface with water. Grind repeatedly until the surface is smooth. Wipe the surface with dry towel.