The Gundam Marker for shading is designed to finish up the model to make it look more "mecha" like.
GM01 ~ GM03 Gundam marker for ink drawing is super thin for painting engraved lines, and they can give you a more mechanical looking finish. Paint run off can be erased with a rubber eraser. The marker ink fixes really well, so it is extremely easy to use.
3 colors are available, so you can use them for wide range of purposes.