MODO | Rust
Rust and corrosion occurs when metal surfaces are exposed to the elements, primarily oxygen and water, from moisture in the air, or water collecting in creases and crevices. This can happen when protective finishes become scratched, chipped or wear off over time. Fortunately, there is an easy way to isolate these areas without the need of UVs and hand painted textures. This quick video shows one way of adding rust to the surface of your mesh in MODO.