The screen used jackets definitely had a lot of processes happen that we just aren't going to do. We don't have a costume department that can sand, paint, and sand every piece of leather.
That said, so far none of the pictures we have shone have actually shown the final shine levels. There are leather treatments that will be done to the final jackets that reduce the shine.
This picture is the one I most trust for all things color and shine:
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Why? I think it's a professionally shot, professionally lit picture. I don't believe it was casually snapped using a cell phone. We aren't seeing set lighting. This, I believe, is a shot that was set up by a photographer, including lights specifically for still photography.
So I think it captures the jackets better than any other shot out there. Not to mention that the color on Riker's jacket is just absolutely perfect for the one pantone color we know 100% to be right.
To me it looks like the perforated black panels are not as matte as the rest of the black portions (with the non-leather portions on the sleeves of course being the least shiny of all).