I stipped my bedroom of wallpaper and want to paint over the plaster with paint. Would i have to use a primer or undercoat before i paint on my chosen paint?
The plaster it self looks fine, no crack or holes and smooth.
No reason why not. Make sure you have removed ALL the paste though. Are you back to bare plaster or is there a leyer of paint over it? If bare plaster do a mist coat first which apart from "sealing" it will also show up any imperfections you might want to fill before applying further paint. 2nd coat watered down by about 10% and the third neat.