Cleaning Parex coloured topcoat

[phatboy]

Hi,

We had EWI installed 4 years ago, and it is starting to collect lots of dirty patches (The joys of choosing white!). Last year I used this, to limited improvement: https://www.amazon.co.uk/gp/product/B001OXH23A/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

This time, I've read the Parex documentation... https://www.parex.co.uk/GetFile.ashx?file_id=990 which says to use a "cleaning agents that can be used on exterior acrylic latex paints." , but I cannot really find a suitable product, as I'm not sure what I should be looking for!

Does anyone have experience of cleaning this type of render?

Thanks
Tim

 

[phatboy]

Anybody have any ideas? House is looking fairly filthy and I don't want to damage it with the wrong product / jet washer