I did this on my previous motor home. Before removing the boxes, I made sure to note what was visible inside the box so that it was finished nicely. I was able to select a material that I liked and rewrapped the boxes, hiding the seems on the inside near the outer edge (farthest from glass) so they couldn't be seen.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor