On 9 Sep, 18:47, "Brian Reay" wrote:

The important question is why the existing paint has come off. My first
assumption would be that it, or the paint under it, hadn't bonded to the
plaster. We had a similar problem and took the walls back to the plaster.
Then start over.

A big job but probably the result you will end up with.

Brian

There must be ten 1cm diameter patches and two areas of "rashes" about
5cm diameter. There is nothing I can see (such as damp) in these areas
that would obviously have lead to the paint/emulsion peeling. For the
(vast) bulk of the walls and ceiling, the vinyl(?) emulsion looks in
good condition but is "grubby" and a change of colour is required by
the "customer". The idea of underpainting the exposed plaster with
undercoat was to try and "build up" the paint depth in the areas the
plaster is exposed. I remember reading somewhere that one can
undercoat glossed walls as a basis for subsequent emulsining rather
than stripping back with chemical stripper to bare plaster.


Clive