Firstly, 5000-grit sandpaper is indeed suitable for sanding and polishing car paint. Typically, sandpaper grits range from 80, 120, 180, 240, 320, 400, 600, 1000, to 2000. The higher the grit number, the finer the sanding result, producing a smoother surface. Given that 5000-grit falls among the higher spectrum of sandpaper specifications, its polishing effect on car paint is undeniably reliable.
However, the polishing outcome achieved with 5000-grit sandpaper is not solely based on the grit itself but heavily depends on the sanding technique and method. If not sanded properly, not only will it fail to achieve the desired polishing effect, but it might also cause damage to the paint. It's recommended to use toothpaste or polishing compound in conjunction with sanding to enhance the result.
During the sanding process, it's crucial to monitor the sanded surface continuously, controlling the pressure and duration of sanding. If extensive whitening appears on the car paint, stop immediately to prevent further damage.
Moreover, polishing car paint shouldn't rely only on sandpaper. Using a dedicated mechanical polisher can yield even better results. Furthermore, bear in mind that sanding thins the paint layer, so it's advisable to apply a new layer of paint over the sanded area. To give the car's surface a shinier look and additional protection, consider applying a layer of wax after polishing.
