A bodywork is the part most exposed to all kinds of corrosion, even due to the very tiny particles emitted by the brake disc. As a result of the action of humidity and air, oxidized iron makes these traces of rust appear in a car. Here are some precautions to prevent as much as possible the formation of these stains and how to treat them.
As a result of air pollution, sea salt for those who live along the coast, or salt used on roads in snowy conditions, not to mention battery fluid, the bodywork is easily oxidized, especially models that appeared before 2000. Some areas are also at high risk due to their situation, such as the exhaust pipe, the lower part under the door, near the roadway, the trunk floor and the floor. They therefore deserve close monitoring in addition to regular maintenance of the car with the non-corrosive products that exist on the market during washing. Thorough cleaning from time to time will prevent the formation of these rusty stains.
In addition to being less aesthetic, a rusty car gradually deteriorates if these traces of oxidation are not removed. Thus, a rubbing with a solvent product added on a cloth will do the trick and with a shot of fine 60 sanding paper if the stain persists. The actual treatment then consists of applying an anti-rust product and letting it dry before passing a second time a sandpaper. The idea is to completely remove the more resistant paint on the rolled surface. In order to level off the part to be repainted, this area must first be delimited with adhesive tape and then filled with filler. When the latter hardens, a second sanding is required using 120 sandpaper and a dusting with a brush.
Paint the parts concerned
Repainting will be done in two coats with the same colour reference as the bodywork. This task is obviously to be carried out in the shade and it is necessary to wait the time indicated in the instructions for drying before starting the second coat which is a rustproof paint for a perfect finish without any kind of corrosion either. Sanding with 400 wet abrasive paper is required between these two applications and cleaning with water and mild soap. A precautionary measure must be considered during this operation, as the spraying of the paint must be carried out at 30 cm from the substrate, but above all wearing gloves, dust masks and safety glasses.