"Rob Morley" wrote in message
t...
In article , "Moonshine"
says...
snip
Success - the PVA worked, woke up to non-cracked plaster. It also
appears as has been said that "base coat" is not the right plaster to
use in this high suction application.

Base coat is an application, not a particular sort of plaster.

You live and learn :-) This
stuff seems to have some fine yellow particles in it too - what might
that be?

perlite/vermiculite?

SAND