Addons used in this project:
The materials is my take on the upcoming Principled Node in Blender 2.79 and also a WIP so there's bound to be mistakes or shortcomings. Any comments or suggestions will be greatly appreciated.
The texture used as scratches can be changed by you at your liking, although there is one included, in a folder called Scratches...IK very creative!
All the textures, bumps and normals were created using Insane Bump in Gimp 2.8 and saved in their own individual folder of textures
Also in the file there's a note with instruction on how to use the material.
I normally use Layers, so check them out if in doubt as to where things are.
NOTE:
This model was made primarily to be rendered using Blender Cycles, if you have any questions please don't hesitate in contact me