Painting hard finish plaster.

[artful bodger]

Oh boy!, what a nightmare.
Could not believe the varying to do's and not to do's I have just experienced in the last 24 hours.
Mission is to paint a couple of rooms with freshly plastered walls (hard plaster).
How would you paint?, and what would you use?.

[rob streeper]

Given the similarities to drywall mud I'd wait until it's thoroughly dry, maybe test with a moisture meter and then prime it well with two coats of a good quality universal primer and then use water based interior paint on it.