I have just plastered most walls in my house. My current strategy is
to paint straight onto plaster that is smooth enough, and wallpaper
onto walls which aren't quite so perfect :-)

I was thinking though. The external walls in my house will probably
get bits of condensation on them, I've seen it before. My question is,
should I even consider papering onto these walls? My thoughts are that
maybe the condensation over time would make the paper peel. A simple
paint covering can be wiped.

Thanks in advance for any replies.

Jim