I do it all the time, with the parts of the pstem that are not worthwhile for fibre. If you leave it natural, it's sort of a tan-khaki colour, and if you use peroxide as a bleaching agent it comes out to a nice laid cream. I produce large archival-type acid-free sheets with four deckels for my own use as art papers. Other places do it commercially, adding a certain percentage of new banana fibre to a percentage of recycled pulp and rag. When BQ finally goes to print, it will be on a gloss paper of this type that is produced locally.
I posted the method I use in another thread a while back....
Here it is!!