One of my favorite boat projects ever, was when we redid our dinette table. Instead of removing the old formica/linoleum material, we simply painted over it with black, printed a large local chart in grayscale, and covered it with a piece of lexan.
It ended up being a FANTASTIC addition to the boat. Aside from (in our opinion) looking nice, and being nautical, it was very useful. We often sit around the table discussing past and future trips, and would have a very handy reference. Very often a conversation would be along the lines of "we were here (pointing), and this happened. Then we went over to here (move the wine glass and point again) and met so-and-so" and so forth. Of course we could do the same with a chartbook, but this was way more convenient.
I will do it again in our next boat, but instead of the lexan, I would rather put a coat of clear epoxy over the top to finish. The plastic scratched too easy, and any spills would just go underneath and stain the chart (we have 'the great red sea' in the north corner thanks to my sister spilling her wine).
I think this might be a great way to re-purpose old charts.