Rough finish after painting gable wall

[kildarekonga]

Question about problem while getting the exterior of a 2006 house painted. The front and back of the house are fine but the gable end has the rough finish pictured. Closer. Unpainted but power washed. 
 

Background: Just bought house and looks like first painting since ‘06. Looks like builder originally painted badly as paint peeling from poor/powery base.
I’ve a guy doing the work for me - nice fellow but more of a handyman than a professional builder and I’m not certain he knows right step to continue. 
 

It’s been treated for mold/algae left then power washed before starting the paint. Stabiliser used in paint (weathershield). 

The lower part in pics had two coats and I’m reluctant to continue with the finish I’m getting. I don’t think another two coats will do anything except leave a well painted but still very visible/rough gable end - ruining the overall job. 

Wonder what the community recommends?

 

[Discoeye]

Separate stabiliser should be used but that will have no effect on the state of the gable end your painting. At a push and a small push using sandtex{clue is in the name it has sand in it} could possibly build up the dips and dives of the wall to give more of a uniform rough sanded look but in reality even if you do that and spot filling its never going to look good and more like the top of a marble cake.

It needs a total render coat to look any good Imho.

Good luck with the project.

[Iceverge]

Put some filler in the cracks as best you can and paint it up I'd say. 

 

A re-plaster is probably the best option long term. 

[kildarekonga]

Thanks both. 
 

I wonder if I should complete or stop the painting? 

I’m thinking that completing the painting at least means the concrete isn’t exposed and soaking up the rain. I'm thinking if that painting is done right with stabiliser it’s at least stopping the wall being a chalky mess and will help the filler and buy me time to get a builder to do a render.

 

But not sure how that will respond to filler or sandex (also saw Trupret masonry repair filler) over it - don’t want to make things worse. Also I don’t want to use up 20l of Dulux then have to try to remove it.  

[ProDave]

Links to pictures don't work.  Why not add them directly in the post?

[kildarekonga]

8 hours ago, ProDave said:

Links to pictures don't work.  Why not add them directly in the post?

Sorry the total of files can be only 5.68mb and my first photo is 6mb. 
I’ve tried to make it smaller. 

[kildarekonga]

[kildarekonga]

Front and back ok. Just gable is bad. 

[Discoeye]

Suitable filler will be fine but remember the filler patches will dry a different colour hence the reference to looking like a marble cake.

The rest of the property looks nice so imho if you have the money get it rendered but if your not planning on doing it yet and your gable end is not taking in water anywhere just finish your painting and forget the filler until your ready to get it rendered.

Toupret filler is really good but just think how many boxes you would through trying to make the wall good, save your money and get it rendered.