Newly plastered walls/ceilings always need to be suitably sealed before painting begins (otherwise the paint will sit on the surface & come off very easily).
When Can You Paint Newly Plastered Walls. I just grab a handy roller and paint, right? nope! It would be good if you can wait for one month or one rain and let the wall dry before starting putty work.
Painting New Plaster Correctly Using a Mist Coat | DIY Doctor from www.diydoctor.org.uk
Firstly are the walls completely dried out , you can't start painting until the plaster had fully dried and this will take longer in this cold weather. Knowing when you can plaster over paint (and preparing it correctly. Use medium grit sandpaper and attach to a sanding pole.
The paint that i applied adhered to.
After you've worked out lumps and inconsistencies, the wall will be ready for paint or wallpaper. Cement plastered walls can be made smooth using wall putty and paint consumption will be less when wall putty is used. Green in colour to aid identification of treated. You can paint with pure freedom, even using a paint sprayer, and spillages rarely cause much damage.
