You shouldn't have black for your spec on your metal. Metal itself has a very high specular value. You could add in a little color to your spec, use the same hue as your diffuse.
I would drop the diffuse of my materials down to 0 until I get the reflections right, and then immediately add HDRI image based lighting, you will likely have to tweak it by lowing the HDRI intensity and/or lowering specular strength afterwards. Also, pieces that are completely and perfectly flat will look weird, much like…
FTW!!!!! I was not able to set the gloss to 256 but the specular I was able too...never knew the spec went pass 100 O.o Now im going back to tweak my maps to adjust....if I could send you a cookie over the internet i would :) @Quack! I tried what you did as well as trying different lighting...learned something :)…
You don't NEED cubemaps or reflections to define metals. They certainly do define metals, but you can fake shiny metal with the basics. I made this image for you....it's HUGE You can see that I use a dark diffuse. From left to right I try various settings to make metal based on your values in your spec/gloss map. If you…