Decorating the lounge, I stripped my ceiling of wallpaper and cleaned it. I then applied one base coat and one top coat. On standing back to admire my handy work, a large bubble appeared. Once dry, I cut around the bubble but it then spread and stripping the base coat and the top coat off the ceiling. On asking advice from a couple of decorators, I was told it was some sort of chemical reaction and they had never seen it before (fat lot of good). I strip the remaining paint off (very easily as it hadn't attached itself to the ceiling at all) and clean it again. I painted it with base coat. It didn't bubble but horrible slashes appeared all over the ceiling. Desperate, I slapped some glue on these areas and painted over it. Seemed to do the job and I managed to finish the lounge. Now slashes are appearing daily. What is wrong with my ceiling??? I need to fix this. I am doing the hall and very worried the same is going to happen. Please HELP.