Iray Dirty Metal Shaders is a set of 30 full flannel shaders and 15 partials to adjust the tiling. These shaders are perfect adding that special touch of grunge and rust to various props and objects in your scene.
How to use:
You must select the item within the preview pane that you wish to apply the shader to, then go into the surfaces tab and select the material zone you wish to apply the shader to, once the item is selected in both places you can then go into your content and find my shader presets and select the one you wish to apply.
Please note because of the uniqueness of the shaders you won't see the desired result until fully rendered.
___________________________________________________________________________________