Ive just decorated a room for someone. The walls were previously painted with what looked like a silk paint. I used a remover to remove all the paint from the walls (as recommended on DIYDoctor) right back to the plaster. I washed all the walls and prepared cracks etc. After all this I then put up my lining paper, pasting both the walls and the paper. For a week or so there has been no problems, but recently I have started painting, and now, bubbling is appearing. I dont get why? The plaster is sound (it is not new plaster) and I used ultra strong paste. Can anyone help as to why this is now showing signs of bubbling and peeling? Thank you.