On 17/03/2021 22:24, AnthonyL wrote:
I'm having some spalled bricks removed from the chimney stack and they
will be replaced with engineering bricks.

The stack is painted to match the rest of the house. How soon after
the bricks have been put back in is it safe to repaint and is any
special attention needed for the painting of the engineering bricks?

I have some partly used masonry paint, some from Wickes and some is
Dulux Weathershield.



If there is an evaporation route for the bricks and mortar via the
chimney flue, just paint away



--
Karl Marx said religion is the opium of the people.
But Marxism is the crack cocaine.