Lime mortar on K rend

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Hi, I have recently had the pointing on a sandstone wall done. Unfortunately some of the mortar has marked a nearby new wall which is rendered with K rend. Can I use brick acid to clean it?

thanks
 
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Joined
29 Mar 2006
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0
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United Kingdom
Hi John,
Thanks for your reply. Yes I have a go with a brush and water, even escalated to a power washer. It is a few marks, notably a handprint and they have set hard. I agree totally that is should be soft but it is just not moving.
 
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