Restoration of the body is carried out immediately after a defect is detected. The body is the most vulnerable in terms of corrosion and performance. According to the degree of damage to the body, corrosion can be divided into three groups - cosmetic, drooping and structural.
cosmetic corrosion appears on the outer surfaces in the form of a rash of rust in the places where the body is mated with overhead parts - decorative overlays, lights, as well as on the edges of the door flanges, hood, trunk lid. This type of corrosion appears primarily where there is a violation of the paintwork. Cosmetic corrosion that worsens the appearance of the car, if left untreated, progresses and turns into penetrating corrosion. Penetrating corrosion affects the most difficult to visually control places where moisture and dirt accumulate. It manifests itself when the damage caused by it is difficult to repair. The inner surfaces of box-sections, the surfaces of the front and rear fenders, the thresholds and floor crossbars, the floor itself from the passenger compartment, and the internal cavities of the doors are most susceptible to its influence.
Structural (through) corrosion affects the places of attachment to the body of the power unit of the chassis, the elements that form the supporting frame of the body. Particularly susceptible to structural corrosion are elements that experience abrasive and corrosive effects - the bottom, sills, wheel arches, front and rear fenders. The loss of mechanical strength of these elements leads to failure of the entire car body.