Got around to cladding my new SII in 30 ga copper sheet, with copper "hats" for the PC3's. Photo is not the best (taken with an old phone), but it conveys the essence of it.
It is still shiny, but will turn a deeper copper red/brown with time. I am pretty pleased with how it turned out.
If I ever get a Kaiju I will use brass.
cheers,
Derek