June 25Jun 25 Someone lazy in our household left concrete blocks on the decking for some considerable time . On removing them get these white marks . Tried cleaning them with various things but won’t budge . This permanent or can be removed ? Some people ! Buy materials ; leave them for a bit and then cause more work . I don’t know ! Tsh !
June 25Jun 25 Author 46 minutes ago, Onoff said: I'd try a bathroom / kitchen limescale remover. Tried that.
June 25Jun 25 Author Just now, Mr Punter said: Brick acid? Do a test patch first. yeah I did think of things like that. But is a visible area so its tricky to "test" a patch......
June 25Jun 25 What about Pink Stuff? Been surprised at what that shifts, calcium deposits engrained on glass etc.
June 25Jun 25 Author 3 minutes ago, Onoff said: What about Pink Stuff? Been surprised at what that shifts, calcium deposits engrained on glass etc. Bit rude mate!
June 25Jun 25 49 minutes ago, Pocster said: yeah I did think of things like that. But is a visible area so its tricky to "test" a patch...... Put another concrete block in a non visible area so you can test it there?
June 25Jun 25 Author 1 minute ago, marshian said: Put another concrete block in a non visible area so you can test it there? 😃. yeah I think those marks were left by blocks that might have been there a bit of time.... Like 1 month ..... or 6...... or perhaps it was a yr or 2 🫠 BUT! As a long term experiment which therefore stops me fixing it now its a very plausible test!
June 25Jun 25 2 hours ago, Pocster said: 😃. yeah I think those marks were left by blocks that might have been there a bit of time.... Like 1 month ..... or 6...... or perhaps it was a yr or 2 🫠 BUT! As a long term experiment which therefore stops me fixing it now its a very plausible test! Perfect solution - glad I could help
June 25Jun 25 Not the same materials, however we had a cast iron seat on our porcelain tiles, when I moved it there were little rust marks where it had been stood. Nothing shifted those rust marks, tried everything… …and then I used a Brillo Pad, and that did it. May work for you?
June 26Jun 26 gpt reckons vinegar, or citric acid and leave for 10 minutes to try and dissolve the calcium deposits... Might need a few repeats.
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