How can I repair water damage on a plasterboard ceiling and wall? This is just stain marks.
Jim from United Kingdom
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Try using TSP "Tri-Sodium Phosphate"
I got a spray bottle, put a 50/50 mix of bleach and water, and sprayed it up there. (Cover any furniture, and keep pets and kids away while you spray!) The mark faded gradually, and can hardly be seen now! It was a plaster textured ceiling, and didn't hurt it in the least!
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