Plastered walls

2 mist coats and 2 or 3 top coats should do the trick

The new plaster will need 3 coats of paint 1st coat is a mix of 30% water / 70% paint 2nd and 3rd coats 100% paint Hope this helps

Hello. A mist coat should be a non vinyl paint (eg contract matt) thinned with water. The non vinyl element will allow a bond between the plaster and paint and allows subsequent coats to bond to the paint. You can use a non vinyl full coat on new plaster but it won’t cover as well as intended so it will cost more money ultimately. New plaster sucks moisture from the first coat it receives. So if you use a vinyl matt as your first coat you get left with vinyl - which flakes off or bubbles. A mist coat will also show you imperfections, highs and low spots which you can remedy before applying expensive top coats. One mist is sufficient, you can thin your first colour layer by 10% if you like then give the next coat a full fat version. Dark colours may need a third coat. Good luck.

Mist coat is intended to create a bond and a base on which new paint will adhere. It's not meant to seal the wall - that's something you don't want to do. The walls need to breathe. So the first main coat will be hard work and will soak into the wall. Subsequent coats will be easier.

It may still soak in but do the full 2 coats of trade quality paints and will look grand.