The first, fundamental activity to be carried out is a careful and meticulous examination of all the metal parts of the bodywork that could be most at risk from rust. Generally speaking, the most at-risk parts are those that are most likely to be hit by flying mud, earth and various materials while driving. This means all parts of the mudguards near the wheels, the front of the car and the lower rear part. Particularly at risk in these areas are parts with dry bends and folds, but also mouldings and areas below the seals, where the sheet metal does not dry as quickly as bare parts. Depending on what you find, you can proceed in different ways.