We need some info/advice for an ongoing problem we have in our hallway. There are a few patches on the walls where the paintwork keeps flaking away. They are in various places, upstairs and down, on internal and external walls. The last time I decorated I rubbed these patches back to the plaster but we still have the same problem. Can anyone recommend a pre treatment/undercoat product we can use before re-painting.
TIA
TIA
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