ᐅ Spotty Wall After Painting – How to Improve It?

Hello,

so far, I have painted the ceilings and walls with non-woven wallpaper in my new build myself and managed to get a streak-free finish using a high-quality silicate paint. Now I moved on to painting our 0.5mm (0.02 inch) lime-cement plaster. After the first coat, there were "clouds" and spots visible everywhere. I have now painted one wall a second time. It’s better but still slightly visible in raking light.

The professional said this is normal because the grains are distributed in different directions when the plaster is applied. However, when you look at other internal plasters, they are usually fully opaque.

What can I improve? Use a different roller (I am currently using one with a 12mm (0.5 inch) pile height)? Dilute the paint more? Prime the plaster beforehand with potassium water glass? Just live with it?

It has to be done twice. Then you have to live with it. You simply can’t do it better.

I’m amazed by your clairvoyant skills. With ceiling areas of up to 20 m² (215 sq ft), I managed to get a streak-free finish on the first coat, but okay.

I’m always grateful for any further useful tips.

Were these also finished with a lime-cement plaster? The texture of the stone is already part of the plaster. Covering it with a layer of paint in raking light is almost impossible.

Yes, it should have been filled (spackled).

It won’t get better without plastering.