Laser smoothing is a post-processing technique that uses laser energy to alter the outer surface of a printed part, often to reduce visible layer lines and improve finish. In FDM and other additive processes, it does not change how the object was built; it changes how the surface looks and behaves. That matters in security because surface texture can affect inspection, identification, and the credibility of a printed component.
In real-world misuse, smoothing can help a counterfeit or tampered 3D-printed part look more like a manufactured one, making layer lines less obvious during visual checks. In defense, the same step needs validation: the laser settings, material, and geometry can affect strength, fit, and appearance. Security teams that handle printed badges, housings, fixtures, or prototypes should treat finishing as part of the control process, not as cosmetic cleanup after the fact.