The simplest situation in repairing the bumper is represented by the presence of slight scratches, usually caused during parking or manoeuvring operations. If the scratches are not deep and do not affect the body of the bumper in a particular way we can eliminate them quite quickly. If the bumper is not painted, proceed with a thorough cleaning of the damaged part with the WD-40 universal cleaner applied with a sponge and dried well with a microfibre cloth.
Then the special abrasive paste is applied to the affected part working patiently and repeatedly with circular movements until the part is smoothed and the scratches disappear. If the scratches are a little deeper, you can use very fine abrasive paper (over No. 400) without pressing too hard. If the bumper is painted, we work in the same way with the abrasive paste, but we do not use abrasive paper especially if the paint is metallic, as its action removes the transparent lacquered finish. If the scratches do not disappear, you have to act differently.