Plasterer is painting pva to painted walls...ready for plastering. .
But pva is not sticking to paint...it's reacting to what ever paint has been used...any solutions?
Try using sbr first or scrapping paint off
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Blue grit the wall then over skim the wall
Clean the surface, scratch the paint gently giving 2coat of stronger pva given some time in between the coats
First check the wall, apply pva and plaster ..... after this start painting