I have never removed any of the fascia trim on my rig - but I think it attached using pin nails…so you should be able to pry it off carefully. I don’t recall if they also use adhesive, but just go slow. The ceiling panels are probably not attached to the fascia. I would use trim screws (screen shot below) to put the fascia trim back, then it would be easy to remove next time. The screen shot from Home Depot shows a gold finish, but I use black finish screws and they blend in with the wood trim just fine IMHO. I used them to reattach my living room crown molding a few years ago when the crown molding fell off.