I painted my last garage inside with the cheapest masonry paint from
Screwfix or Toolstation, was just in plain pots with their own labels
on it.

I am now looking to do the same again but I notice that I can get 9lts
of Dulux weathershield masonry paint in Costco for around £15 so would
be as well to get this.........

Thats if its ok to use, I seem to recall someone saying to me that you
have to be carefull when painting inside garages as the brick still
has to breathe or something along that lines...

Is this true or just a load of tosh.........its just your run of the
mill breeze block.

Any ideas, tips or info.

Also does it make much of a difference using stabilising primers or is
it best to horse it on.