Hello, We have recently had two rooms downstairs re-plastered. It dried for about 2 weeks when we then applied two coats of white paint for new plaster. We have painted one feature wall sage green with rest being a light cream. The green wall has come out so patchy! After 4 coats I have given up and not sure what to do next. It almost looks like some areas of the plaster are smooth and some are rough but we didn't notice this before we started painting. Is there any tricks to getting a smooth finish?