Isair-
The nozzle piece has a bump map I created from a pic of brushed stainless. I believe I used cylidrical placement to get that look.
I have color maps and/or bump maps on every part, some barely noticeable.
Someone posted earlier that in the real world surfaces are never perfect, and that seems to be one of the pitfalls of rendering. Perfectly reflective surfaces can be great if your trying to showcase an idea, but if you are going for realism it never works. I believe that all of the subtle details are what make the difference, the details you don't notice right away and that we subconciously pick up on that make the diffence.
I am a total novice at rendering, I learn something new every time I render an image. ProE makes it easy to get good results. Knowing something about photography helps as well, for lighting and some of the detailed effects.
Thanks, DG