Hello I’ve mist coated newly skimmed landing, stairwell and hall. I mist coated I think 60 emulsion 40 Water. I’ve started cutting in the top coats and two things are happening. Firstly, in a very few places the paint is blistering where the new paint is being applied. secondly, when I’m cutting into the corners the paint the brush is lifting off the mist coat showing bare plaster. I’m assuming both these things are caused by the mist coat not binding properly to the plaster?? Did I cause this by applying too much mist coat so it didn’t look so washed out? I’ve also noticed that areas that I cut in last night and have dried, scratch off again really easily. I’m under huge time constraints but don’t want to rush it and find that a heavily trafficked area (hall and stairwell) will just get easily scratched within a short period of time. I have a couple of cans of Zinsser BIN, will this cure my problem if I apply that (I would have preferred to have used Albany Primer Sealer but they are closed today) will the Zinsser soak in and bind the plaster and toughen up the surface? Any help would be greatly appreciated.