samples of your attempts at it would help. make a good specular map that has some detail that is not in your diffuse, and add a gloss texture, and try using a cubemap depending on the effect you want.
/edit: What he said basically ^ Well, as mentioned previously, the metal in that first picture relies heavily on a reflection map. So look up some tutorials on setting up a cubemap in UDK, and add that to your material. I believe there's a lot of info on cubemaps when it comes to creating glass materials for udk. Then,…