I've just hung lining paper all over the walls in my Dining Room. I sized the walls to help move the paper into place and everthing looked fine. I bought some paint about 3 months ago to paint directly onto the walls but decided to line them to get rid of the lumps and bumps. Anyway my wall papering must have gone slightly bad as when i painted i found air pockets and the paper bubbled up. Is it due to the paint type (emulsion)
or just bad papering? Any tips to get round this?