Well it's oxidized metal, so I would think not. A good place to start from if anyones intent is to get a base material as accurate as possible: You could make a template for black oxidized metal (or MANY materials) based off its brdf in the Merl 100- http://people.csail.mit.edu/wojciech/BRDFDatabase/brdfs/ Disney's viewer…
I don't think so, and it would be extremely hard to create one. The problem really boils down to the fact that roughness is a property of a surface boundary, whereas reflection is a property of a material. You can roughen or polish surfaces pretty much however you like. That said, there are material reference databases…