To protect artwork I work with framers who cut and finish the wood frames by hand. The artwork is professionally mounted on acid free, museum quality mat boards. I choose framing material that matches the handmade gampi paper on which the palladium printed image sits. This simplicity lets the artwork be the focus.
I use UV protected plexiglas which protects the artwork. I also may opt for Museum UV plexiglas which reduces the reflection of light on the artwork by 20%. This may be the choice for artwork that will be displayed in a room with light coming into the windows.