Cavity Protection
see 9814075 and a hose nozzle with 360 degree spray pattern (see the illustration above). Insert the hose in the cavity and spray while slowly pulling the hose out.
If repairs are made to the body, the areas marked in the illustrations are to rustproof extra thoroughly. Use: Cavity protection, 116 1682
This applies, for example, to weld seams and areas that have been worked with in other ways.