ᐅ Walls initially smooth, but after painting show streaks and marks
Created on: 23 Feb 2019 10:00
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B.Baumeister
Hello everyone
I want to have most of the walls in my house painted instead of using wallpaper. I have gypsum plaster and have already worked on the first rooms.
So far, I have been doing it manually, but now I have bought a long-neck sander.
My question: after filling and sanding, the walls are always perfectly smooth. Then I prime and paint, but afterwards there are very noticeable grooves and marks in the plaster. What am I doing wrong?
Regards
Enrico
I want to have most of the walls in my house painted instead of using wallpaper. I have gypsum plaster and have already worked on the first rooms.
So far, I have been doing it manually, but now I have bought a long-neck sander.
My question: after filling and sanding, the walls are always perfectly smooth. Then I prime and paint, but afterwards there are very noticeable grooves and marks in the plaster. What am I doing wrong?
Regards
Enrico
B
B.Baumeister23 Feb 2019 19:23Nordlys schrieb:
It just wasn’t smooth. To repeat for you: If it is more uneven after painting than before, it doesn’t matter how smooth it was originally. It has definitely got worse! Understand now?
I used B1 primer and a brush to apply it.
Did you have a continuous film after applying the primer? If yes, the gypsum plaster was either not absorbent enough or too much was applied. The grooves then formed due to the accumulation of the binder. This should also be mentioned in the application instructions. The only solution is probably to sand it down and repaint, of course without applying another primer.