Hi. I have had a room walls repleastered. They were left to dry and then 2 mist coats of emulsion painted on top - each time they were sanded down . Now i can not get an even coverage of matt paint. The top layer looks dimply and shiny in places. I have used a roller and followed countless videos on how to roller a wall but still they look awful!! I am using Dulux Endurance Matt paint with a Hamilton Vantage smooth and textured roller. Is my paint too thin/thick. Please help - I am sending my family insane - not to mention the cost of paint etc!!!