Painting exterior rendered walls after removing old paint

[EMILYD2016]

Hi, I have a 50's ex council house, rough rendered. The paint on the back wall was blown badly in a number of places (probably due to weather and the half hearted effort the council put into maintenence and painting of the walls) so I decided the best course of action was to remove the paint. Ive blasted it off with a jet wash, which was hard and messy, but it's done.

Now i have a wall which is bare of paint, I'm going to fill some thin cracks in the mortar with something? But my question is, do i need to apply a coat of stabilising solution before painting it? It's solid and not dusty (if that makes sense!

I'll post pics below

 

[EMILYD2016]

I plan to go a little further up with the removal of the paint but I'm on my own, and on a budget and can't get help. So I won't be scraping around on a ladder up there. The paint at the top is stable and not blown

 

[ray.birch]

If the surface is not chalky, dusty or porous, you should be fine to go straight to painting without stabilising solution. Did you have a particular paint in mind?