Instruction:

To right setup of node connect :

1. In your scene File -> Append (shift+F1) -> Select “CGW_Metal_Precious_shader.blend”->
   1. Material -> “CGW_Metal_Precious” to load already setup material;
   2. NodeTree - to add only nobel node, if you want add it in your material. After that you can add node: Node Editor -> Add -> Group -> CGW_Metal_Precious;
2. Connect Texture Coordinate node (Object) to mapping sockets in Nobel shader;
3. Connect outputs to appropriate Material output sockets.
4. Do the same steps (1-2 to add CGW_Metal_Precious_preeset's node)

To conrtoll of Global scaling of material, use node Mapping (Add -> Vector -> Mapping & transform it)

This is a part of CGW Metal procedural shaders collection.

Enjoy!