Here my copper grunge texture belonging to the tutorial Custom metal panel.http://preta3d.com/forums/viewtopic.php?f=23&t=426
Why not a Preset?
This was discussed with Paolo, the risk is to big to place copyrighted images in one preset.
So i am giving my free copper texture here. you have to figure it out, the settings, by yourself. And read my story to figure it all out. this is not to bully you all, but the small letters.
It is no rocket science at all to apply if you read the story.
Here the texture