I am working on a character with some metallic armor. To get the look of dirty, worn metal I have mapped different jpg images to the color, bump and specularity attributes on a blinn material. That works fine.
But when I do a black and white jpg and plug it in to the reflectivity attribute, the object gets maximum reflectivity all over. I have tried changing the appearance of the reflectivity jpg, but that has no effect on the reflections; when rendering, the object still gets the look of polished chrome (not what I want).

I am using maya 2008, mental ray and have set up an hdri sphere and a couple of lights.


I would very much appreciate some help!