Can Deep Car Scratches Be Repaired?
2 Answers
Deep car scratches can be repaired using the following methods: 1. Clean the damaged area and carefully fill it with touch-up paint; 2. Lightly sand the damaged area with ultra-fine sandpaper. For larger damaged areas, spray painting can be used for repair; 3. To avoid getting paint on other parts of the car body, use cardboard to mask the surrounding areas; 4. After completing the touch-up, rinse the treated area with clean water, sand the touched-up paint with ultra-fine sandpaper to smooth it out, rinse again, and then apply car wax. Methods for maintaining the car's surface include: 1. Waxing; 2. Using specialized equipment to press vehicle protectants into the car paint, forming a protective layer; 3. Using a coating machine to evenly spray liquid wax onto the car's surface for coating; 4. Performing surface grinding and polishing to treat the paint surface.
Last time my car door got a deep scratch from a key, deep enough to catch a fingernail. If the scratch hasn't reached the bare metal, it can still be saved by smoothing it with 2000-grit sandpaper and water, then covering it with matching paint. But if you can see the metallic shine at the bottom, that's beyond what a touch-up pen can fix. Exposed metal will gradually rust, eventually causing paint to bubble and peel. I've seen how 4S shops handle deep scratches: first they scrape off the rust, fill the dent with aluminum welding rods, then apply three layers of different textured paints before baking it dry. The whole process takes seven to eight hours, and the result is indeed indistinguishable from new paint. However, this kind of repair requires highly skilled technicians - at ordinary quick repair shops, the result would look like a band-aid patch.
