The markings may be indentations, holes, and/or bumps. The dots may be manipulated to accommodate features of the surface, such as windows, doors, indicia, and edges of the sheets. The markings are preferably transferred to the sheets by a metal working machine. Thus, the method may include generating one or more control files that may be used by the machine.
Angel Hair® Zahner Patent
US 20100233942 A1
A patented fabrication system for producing Angel Hair non-directional finishes on metal surfaces. An apparatus for applying a lightly scratched surface to a metal sample comprises a motor, a disk, a frame, a motion guidance unit, and a plurality of springs. The motor may provide a rotational motion to the disk which includes abrasive elements configured to create a plurality of microscopic scratches on the surface of the metal sample.