Raw Metal (RM).
Raw Metal is both color-fast and corrosion free, so it doesn’t need a protective layer.
This alloy has a dark grey, concrete-like and industrial look. The rough look is achieved during the finishing phase, when the item is taken out of its sand mould: the casting remains are removed, but the object is not polished. After some time, the metal will have a slightly shiny look, since it will be polished naturally when using the item.