Metal filaments give your 3D prints the look and feel of real metal. They are PLA loaded with real copper, bronze, aluminum or steel powders: they appear dull when first printed, but once sanded and polished they reveal a true metallic sheen.
Some copper and bronze variants can even oxidize over time, creating the patina effect of antique objects. They are heavy to the touch and ideal for medals, jewelry, historical replicas and premium-looking prototypes. They can be finished almost like the original material, with sanding and polishing.
Two practical tips: use a hardened steel nozzle, because abrasive particles quickly wear out brass, and maintain moderate printing speeds to avoid clogging. Also discover Wood filaments and Special / Exotic filaments for other decorative effects.