How to deal with polishing marks on black cars?
2 Answers
To deal with polishing marks on black cars, use G3 polishing wax for a one-time polish, followed by waxing. Precautions for car polishing include: 1. The key to operating a polishing machine is to maximize the polishing rate to quickly remove the damaged layer caused by grinding; 2. Ensure that the polishing damage layer does not affect the observed structure, i.e., it does not create a false structure. The purpose of car polishing is to eliminate fine scratches on the paint surface, address minor paint damage and various stains, thereby achieving a bright paint effect. After polishing, minor defects such as coarse particles, sandpaper marks, flow marks, whitening, and orange peel may appear on the paint film surface. To compensate for these defects, grinding and polishing are usually performed after spraying.
Last time my black car also showed swirl marks after washing, and the auto repair shop owner taught me the solution. The polishing marks were mainly left by insufficiently fine grinding and polishing before. The first step is to perform mirror restoration: use fine polishing compound with a soft foam pad at low speed and slow polishing, paying special attention to keeping the technique steady—absolutely no pauses or uneven pressure. After polishing, inspect the paint surface with a strong flashlight at an angle until no spiral marks are visible. Finally, it’s essential to apply a ceramic coating or paint protection film as a protective layer—black paint is too delicate, and swirl marks will reappear after just a few days parked outdoors. Throughout the process, machine speed must be carefully controlled; if you lack experience, it’s best to seek professional service.
