Getting metal reflection for lamp?

Hi, am having an issue. Well, nodes are really aggravating to me, so…

I want to make a metal texture on the metal parts, of course- but even with gloss, the glossy effect only appears on smooth shading, but not flat. On flat it just looks matte…
Of course, I don’t want to turn it to smooth shading because those are hard edges and it is not smooth!

What to do? :S

Not sure,what your goal is. But you have several options (maybe more).

Try to increase faces. on flat surfaces (sub division modifier).
As I understand it, Smoothing makes from QUAD surfaces, TRIS.
Your lamp arms are just long quads (surfaces of 4 vertices).
Solution could be to add more quads (subsurface modifier).

When using sub surface modifier, you can try this.
set crease

and / or

sub divide simple

An other trick people use is to create additional edges close to (along) other edges, which need to be sharp.

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