At ACTech all parts are initially cleaned according to needs, e.g. by blowing with compressed air, shock wave technology, blasting technology, thermal treatment in the furnace or by a combination of various methods. Certified testing personnel subject each metal part to at least one visual inspection with particular attention to mold material and material residues, surface defects, etc. The internal geometries of parts are also tested by means of endoscopy, the diameter of the endoscope ranging from 2.4 to 8 mm.