Hello All - I'm lining papering a room in preperation to wallpaper over the top. I have seen on other posts here about leaving a hairline gap between drops if covering with paper - would it be ok to leave this gap/join on an external corner with a view to the finishing paper wrapping around the corner and over the join. The reason I ask is that the walls are pretty rough and i am using 1700 grade lining paper which doesn't take on the external corners ( which typically aren't that true) very well and it would just be easier to seam it there. Any advice will be very welcome.