"ARW" Wrote in message:
wrote in message
...
On Thursday, 14 July 2016 21:23:52 UTC+1, ARW wrote:
tabbypurr wrote in message

PVAing the plaster is a fashion without need. Paint onto bare dry
plaster
results in the liquid in the paint being sucked into the plaster,
leaving
it short of glue, hence the peeling. Solutions:
a) 50/50 diluted ****coat first
b) paint the plaster with water, wait 5 minutes then paint as normal.
c) dilute PVA onto plaster first. Too much and you get slicks paint
won't
stick to.
I prefer B, it's quicker & stronger. C I'd avoid.


so b) is quicker and stronger than a)?

Yes. The watercoat is extremely fast to do, nothing like a coat of paint
where you need to take some care. So you get a full strength coat in a few
minutes more than it takes to do the ****coat. With a ****coat much of the
diluted glue soaks into the plaster, weakening the paint. With B it doesn't.



Well that's every professional painter and decorator I have ever seen at
work doing it wrong then.


You really did read it all here first....ever...
:-D

--
Jim K


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