Very tenacious trace of cement pot on stone terrace

Old 10-17-18, 03:42 AM
Thread Starter
Join Date: Mar 2015
Location: Switzerland
Posts: 29
Received 0 Votes on 0 Posts
Very tenacious trace of cement pot on stone terrace

I left a pot made of some kind of cement for some years on my terrace.

I tried to remove the trace with a metal brush rubbing like crazy, but to no avail (see photo).

Any idea of a chemical solution to this?

Attached Images  
Old 10-17-18, 04:58 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 27,892
Received 1,508 Votes on 1,355 Posts
Part of the problem isn't the ring the pot left. It's that the pot protected that part of the concrete while all the rest weathered and mildewed. I would start with a good pressure washing of the entire terrace. That should clean and lighten the rest to more closely match the area under the pot. Then if you still have a ring I would try a mineral dissolving cleaner like CLR or use straight white vinegar.
Old 10-17-18, 05:07 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 49,125
Received 622 Votes on 550 Posts
I agree! along with PWing I'd scrub the terrace with a bleach and TSP solution to help remove the years of grime. An old broom works well for scrubbing.

Thread Tools
Search this Thread
Ask a Question
Question Title: