As anyone attempted to line the shower room/toilet area with plastic interlocking panels over the original wallpaper to make the room more usable. If so did you go around the mirrors etc or remove and place the panels behind. Also do you recommend a Wooden duckboard to relieve the strain on the Shower tray when using the toilet or sink. Finally did you strip the wallpaper back or simply stic the UPVC panels to the wallcovering