"Jim Scott" wrote in message
...
Are proprietary 'Stain block' paints any better than oil-based undercoats?
--
I used Dulux (I think) stain block in the airing cupboard to cover stains
from a leaking pipe in the loft. Initially applied normal Dulux matt
emulsion but stain came back. Used stain block + emulsion and no sign of any
stains.

I have also heard this being used to cover nicotine stains as well.