The SATA filters of the series 100 are low-maintenance air filters for the prep area. A perfect finish can only be achieved on a perfect foundation. In the best of cases, dust particles, condensate and compressor oil are detected during the primer sanding process. Very often, however, coating flaws are only noticed later on when the top coat is applied. The consequences are the need for rework and thus additional costs. This is why compressed air should be already perfectly filtered in the prep area.