Regular repair of minor damage to the paint pays off, as this can avoid the spread of rust and larger repairs.
With small scratches and traces of stones that affected only the outer layer of the paint and did not penetrate to the bare metal, it is generally enough to tint with a varnish pencil. Along with paint applied with a small brush, a commercially available color film is often useful if the damage is very minor or when only a primer needs to be applied.
Deeper damage from stone impacts, when small spots of rust have formed, are removed "diligent rubber band for rust" or scraped off with a knife until bare metal appears. It is important that the smallest traces of rust are not visible. Under "diligent rubber band for rust" this refers to a small plastic sleeve with a short wire brush for scratching out rust.
Bare metal must be perfectly dried and degreased. To do this, treat the repair area and the surrounding paintwork with a silicone remover.
Apply a little lacquer primer to bare metal with a thin brush ("Primer"). Since primers are most often available in aerosol cans, sprinkle a little primer on the lid of the jar and dip the brush into it.
After the primer layer has dried, touch up. In paint cans, the brush is usually built into the lid. If only an aerosol can is available, sprinkle some paint on the lid of the jar and dip a watercolor brush into it. At the same time, apply only a very thin layer of paint for each working pass so that the paint does not spread. Finally, let the paint dry well. Repeat the process until the crater is filled and until the deepening of the repair site in relation to the surrounding painted surface becomes invisible.