Exterior wall preparation prior to painting

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29 Sep 2016
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United Kingdom
My brickwork is already painted with masonry paint (dulux trade weathersheild) and the bottom couple of courses with black bitumen paint.
Problem 1
The problem I have encountered is that I am getting salt behind small areas of the masonry paint (tried to leave it to dry out but driving rain seems to have other ideas). This salt causes the paint to bubble and come off. The dampness originally comes from a leaking roof and gutters which has been sorted.

Problem 2
The bricks which are painted with the bitumen paint are chalky to the touch. This causes the paint to have a short life. These are a different type of bricks.

My query is could stabilising solution solve both issues? Or at least help?

Any replies much appreciated.
 
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