How to get rid of a rancid paint smell on walls

I've just painted a bedroom and there's a horrible sour smell coming from the walls. The paint was bought a while ago. How long will this smell last? Do I have to get it off the wall?

Asked by Adam on 23rd May 2026
Expert Trade Answers
"You can use a red zinzer bin neutralizes unpleasant odors on the walls and ceilings before painting"
Answered on 23rd May 2026 - Member since Sep 2025 - report
"It's hard to get the paint off the wall if it isn't nicely plastered room, plus if the paint properly soaked into the wall with the smell itself being embedded you will need to use sealing undercoat; watertight coat and then paint with the desired paint on top of this."
Answered on 23rd May 2026 - Member since Apr 2026 - report
"There are several ways of checking where the problem is coming from one is to have the wall checked for moisture, this is done by using a gauge there are several companies that will do this. Dampness in the cavity and brick work can often be the cause of horrible and unhygienic smells."
Answered on 23rd May 2026 - Member since Jan 2026 - report
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