A procedural metal material with rust, bumps and brush effect.

Properties: 1. Control of noise rust.

1. control of color gradient, roughness, metal and bump.

2. Bump and scratches control with intensity, sharpness and different color mixing between the levels.

3. brushed surface control with sharpness, intensity and roughness control.

4. A mix intensity node for mixing between metal and rust.

The default values are for iron but you can change in any color you want to accommodate your metal or surface material. Examples can be bronze, brass, titanium etc...

the metal group shader consist a mixing between metal and diffuse shader. The more metal the less diffuse will be visible.

Although rare, i felt it should be added. In addition you have specular control and IOR for the diffuse shader.

Values for controls are not normalized, the result are Clamped so no value get out of normalized range.

you will have to change setting in order to get the result you want.