On Sat, 10 Oct 2009 15:16:43 -0700 (PDT), geraldthehamster
wrote:


What did you use for this first "primer" coat? New plaster should have
first a skim coat of diluted emulsion (opinions differ, I dilute with
25% water but others seem to use more). This bonds with the surface of
the plaster and allows subsequent coast to bond securely.

Sorry for the late reply. It only peels when damaged, such as knocks
and bumps. I can't remember what primer I used, it was a years or
three ago, I think it was a (relatively) expensive primer made by
International Paints. I've since discovered Blue Hawk primer in B&Q
which costs less. Actually the Blue Hawk looks like very watered down
emulsion and I have often wondered if I could save even more by using
cheap emulsion watered down but I haven't been brave enough to try.