Hello,,,ive just sanded down my stairwell which was a bit of a chew on,,,it had been painted with some kind of latex paint i think straight onto the plaster,,,anyway as you can see on the picture some of it on the plasterboard wall have flaked off when ive sanded,,,so i was wondering what is the best for a first coat back over it,,,???,,,should i give it a coat of matt emulsion,,,???,,,or should i mist a bit water onto the bare plaster patches and go over it all with a latex paint,,,???,,,or some other way,,,???,,,any advice from you lads who know what youre talking about please...