Reel seat hardware mostly comes in either aluminum or Nickle-Silver. The aluminum is lighter & less expensive, but if correctly polished will take an expert to tell it apart from its Nickle-Silver counterpart. Nickle-Silver will develop a patina over time which will give it the appearance not unlike a five-cent nickle coin - unless you polish it frequently to keep it's shine.
Take a look at the photo below. From the left are polished aluminum, "brushed" aluminum, & polished Nickle-Silver:
So, if you've been thinking about a custom-made fly rod for yourself, please contact me & we can discuss what it is you want. Not sure? Well, we can bounce ideas back & forth & work together to design a rod that will look & fish exactly as you want it to. As you can see, the possibilities are endless.