can ordinary emulsion be applied straight over a well cleaned/prepared interior wall that has suffered previous damage from a leaky roof? The problem was cured long ago and the wall has been dry for a couple of years or more. The sand/cement rendering to the wall is in good condition but the staining remains. Is the stain likely to bleed through and, if so, any ideas how to stop it doing so.
Many thanks
Nick.
By 'eck, it's been a grand day.