PeterW Posted April 14, 2022 Share Posted April 14, 2022 Just now, pocster said: environmental trying to avoid acid and bleach All cleaning products have an impact - but used correctly they are fine. The Lithofin products are alkaline but to get that black off you’re looking at either chemical or mechanical cleaning. You could re-face the quoins with a diamond honing disk in a grinder but you would need to be very careful. I would start with Lithofin and a scrubbing brush and plenty of clean water and see how it goes. Link to comment Share on other sites More sharing options...
SteamyTea Posted April 14, 2022 Share Posted April 14, 2022 23 minutes ago, pocster said: As you say . Don’t want to damage the stone . Also environmental trying to avoid acid and bleach . As says 19 minutes ago, PeterW said: All cleaning products have an impact - but used correctly they are fine. RTFM, or spend the rest of your week with a bucket of deionised water (in itself very environmentally damaging) and a toothbrush. Link to comment Share on other sites More sharing options...
Pocster Posted April 14, 2022 Author Share Posted April 14, 2022 @SteamyTea not trying to remove cement from quoins / copings . Just deeply embedded dirt / pollution. Link to comment Share on other sites More sharing options...
SteamyTea Posted April 14, 2022 Share Posted April 14, 2022 2 minutes ago, pocster said: @SteamyTea not trying to remove cement from quoins / copings . Just deeply embedded dirt / pollution. Ah, right. Paint it white. 1 Link to comment Share on other sites More sharing options...
Pocster Posted April 14, 2022 Author Share Posted April 14, 2022 16 minutes ago, SteamyTea said: Ah, right. Paint it white. RTFT 😁 Link to comment Share on other sites More sharing options...
SteamyTea Posted April 14, 2022 Share Posted April 14, 2022 Or black. Link to comment Share on other sites More sharing options...
bassanclan Posted April 15, 2022 Share Posted April 15, 2022 On 14/04/2022 at 00:01, TonyT said: BC5L? everbuild acid ? Its definitely high concentration bleach, just not sure on the brand name Link to comment Share on other sites More sharing options...
Pocster Posted April 19, 2022 Author Share Posted April 19, 2022 Struggling still with the black Lithofin Had little effect . For the quoins resorted to dilute bleach 😞 Link to comment Share on other sites More sharing options...
Pocster Posted April 24, 2022 Author Share Posted April 24, 2022 Spent all today trying everything to clean these Quoins. No joy!. Any other products to recommend?????? Link to comment Share on other sites More sharing options...
TonyT Posted April 24, 2022 Share Posted April 24, 2022 As per previous reply. Doff.. Link to comment Share on other sites More sharing options...
Pocster Posted April 24, 2022 Author Share Posted April 24, 2022 1 hour ago, TonyT said: As per previous reply. Doff.. Isn’t bleach , bleach though ?? Bleach works to some extent . But I can scrub 1 quoin face for 25 minutes . Just imagine …. Me in the street with a bottle of bleach , swearing - like a local alchi . There must be an easier way . Link to comment Share on other sites More sharing options...
TonyT Posted April 24, 2022 Share Posted April 24, 2022 Doff https://www.concreterenovations.co.uk/news/a-brief-guide-to-doff-cleaning/ Link to comment Share on other sites More sharing options...
Onoff Posted April 24, 2022 Share Posted April 24, 2022 Stop faffing and get some brick acid. Hydrochloric is what you want. I just cleaned the bottom few courses of my pillar with the flints in. (Just wanted to see what it'd look like). The label is worn off of my 5L container but I did one wash with it dilute 1:1. Nasty stuff, I wore a rain jacket, rubber gloves and a full face Bionic visor. Use a scrubbing brush and dip in the dilute acid. Scrub from left to right. Hose off: Going to give a few days for the mortar to go off then acid wash from the top down. Should clean the brickwork and bring the black of the flints out. Link to comment Share on other sites More sharing options...
Pocster Posted April 24, 2022 Author Share Posted April 24, 2022 1 hour ago, TonyT said: Doff https://www.concreterenovations.co.uk/news/a-brief-guide-to-doff-cleaning/ Don’t want no man in a gown rubbing my rocks ! Link to comment Share on other sites More sharing options...
Onoff Posted April 24, 2022 Share Posted April 24, 2022 Got to sort that fence out on the right too...not mine but I'm going to see if they mind me putting in concrete posts and criss cross trellis to match mine. Link to comment Share on other sites More sharing options...
ProDave Posted April 24, 2022 Share Posted April 24, 2022 10 minutes ago, Onoff said: Got to sort that fence out on the right too...not mine but I'm going to see if they mind me putting in concrete posts and criss cross trellis to match mine. Before or after finishing the bathroom? Is THIS thread really 4 years old? 1 Link to comment Share on other sites More sharing options...
Pocster Posted April 24, 2022 Author Share Posted April 24, 2022 44 minutes ago, ProDave said: Before or after finishing the bathroom? Is THIS thread really 4 years old? Still waiting for him to box in the (expletive deleted)ing boiler Link to comment Share on other sites More sharing options...
Simplysimon Posted April 24, 2022 Share Posted April 24, 2022 1 hour ago, Onoff said: Got to sort that fence out on the right too...not mine but I'm going to see if they mind me putting in concrete posts and criss cross trellis to match mine. very generous calling that a fence 😀 Link to comment Share on other sites More sharing options...
Onoff Posted April 25, 2022 Share Posted April 25, 2022 9 hours ago, ProDave said: Before or after finishing the bathroom? Is THIS thread really 8 years old? Rolling forward to 2026... Link to comment Share on other sites More sharing options...
Onoff Posted April 25, 2022 Share Posted April 25, 2022 8 hours ago, pocster said: Still waiting for him to box in the (expletive deleted)ing boiler Cheek, you've had captives in that basement for longer! Link to comment Share on other sites More sharing options...
Pocster Posted April 27, 2022 Author Share Posted April 27, 2022 Today I tried this product Here is before and after . We are looking at just the area above the broom handle and to the left - a test … Link to comment Share on other sites More sharing options...
Pocster Posted April 27, 2022 Author Share Posted April 27, 2022 Ffs ! File upload shite product Link to comment Share on other sites More sharing options...
Pocster Posted April 27, 2022 Author Share Posted April 27, 2022 Before Link to comment Share on other sites More sharing options...
Pocster Posted April 27, 2022 Author Share Posted April 27, 2022 After Link to comment Share on other sites More sharing options...
Pocster Posted April 27, 2022 Author Share Posted April 27, 2022 (edited) Winner ! Will try on quoins next Edited April 27, 2022 by pocster Link to comment Share on other sites More sharing options...
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