The supplementary process with the use of an Pantatec additive can be easily integrated in the existing process with blasting systems with circulating metallic blasting medium. For example, the Pantatec additive can be poured directly into the return flow of the blasting shot or the blasting medium reservoir. Pantatec is permanently mixed with blasting media on the transport, in the supply hopper and during the blasting process. Pantatec is immediately effective and, within a short time following admixture, a significantly better free flow capacity and therefore an improved blasting result without washing will be clearly visible.