Don't suppose you have any idea what the right chemicals might be? I tried power washing and steam cleaning both to no effect, is bleach safe on acrylic do you think?(y)
Last summer I had a new front wall built which was breeze block, rendered with a Johnstone's coloured acrylic render. A few weeks after the render the stain shown in the photos below started to appear. I have not been able to get rid of them, I tried a product called Wet'n'Forget but it didn't...
I had a new front wall built last summer which was breeze-block rendered with a Johnstone's Acrylic coloured render. Soon after the render was completed a stain appeared which has been there ever since. I have tried a product called Wet'n'Forget to try and remove it, but it has not worked...
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