I take not credit for these, my journeys into looking for how to set up my own nodes helped me get to them, so Google and the Blender Artists forum get the main credit, I'm just putting them here for personal reference, and for anyone else to see/use! Click through on the node setups for a bigger/clearer image. I'll update this page as and when I figure out different materials and stuff!
I use what is called a Node Group for my Metal materials, it means you can do your stuff inside the group, and when you're done it keeps your node window tidy and stuff. To make a note group, you select what you want to be in the group, press Shift+A and then select Group>Make Group You can also make one by having a blank node screen, pressing Shift+A, select Group and then select a Nodegroup.
To edit a nodegroup you just press Tab while you have it selected.
Here you will find my tutorials for a variety of different programs! Check the categories for different tutorial types if you can't immediately find what you are looking for!