rust

Well i got a new unit of black orcs and instead of painting there choppas and great weps with blood i want to do a rust style. only problem is i really dont know how to do it. if some one could do a good step by step or even just some hints and tips that would be great. thanks

Hi, I know, there must be like a thousand posts describing how to paint rust, but I just can't seem to find a good one. I'm probably just really bad att searching though but I'd really apprechiate if someone could write down a good techinque or a link to a good post on the subject.