Looks Great!
Although.. Since you said that it's supposed to have metal shading, I guess I'll share my thoughts as to if it got that kind of shading.
First, I believe that the shading is a bit "soft"
And what I mean by that is that it's a bit lacking in the intensive shading.
Usually, when making something out of a material, the shading is supposed to complement that.
However, the feeling that I get when looking at that doesn't really signify that it is made out of metal at all. (other than the lower part of the arms.)
So maybe you should try intensive shading(Shading where the difference in colors are very drastic)
Other than that, I like it!
View attachment 217140
Btw, what exactly is that though?