Digital BW, The Print

I'm very fond of my carbon prints on Premier Art FineArt paper, even to the point where I now have some 11x14 prints at a gallery with no glass or plexi, simply matted and in Nielsen matte black frames.

I've coated the prints with Premier Art PrintShield, which I suppose affords some protection. It just seems the blacks are richer with nothing else interfering with their appearance. But I'm a little nervous about their being vulnerable to dust, wayward fingers, etc.

Over the years, with my darkroom prints, I've used ordinary glass from a local glass shop... I've heard window glass has a greenish tint. I've not noticed it previously, maybe I haven't paid enough attention. And some brands of plexi seem clearer than others, from what few plexi framed prints I've seen.

Thoughts, anyone? (I did check previous threads, have seen some mention of this, sorry if this subject has been beaten to death but I didn't quite find my answers.)

Thanks!