BogMonster Posted September 22, 2008 Share Posted September 22, 2008 Somebody I know here has just had cement all up the side of a nearly new vehicle and unfortunately didn't notice it (it looks much like clay...) until they tried to wash it off by which time it had set solid Searching around t'web I see that white vinegar is suggested as one way of taking cement off paintwork - has anybody got any first hand experience of this? Does it work? WD40 is suggested as another way but gets mixed reviews. The vinegar idea seems to have a basis in chemistry (acid product onto an alkaline product dissolving it) but I wonder about any effect on the paintwork seeing as it is a nearly brand new vehicle. Ta Quote Link to comment Share on other sites More sharing options...
disco_al Posted September 22, 2008 Share Posted September 22, 2008 vinegar shouldn't affect the paint too much, as it is not an overly strong acid, as long as it's flushed over with plenty of clean water afterwards it should be fine. Quote Link to comment Share on other sites More sharing options...
Guest noggy Posted September 22, 2008 Share Posted September 22, 2008 got any pictures? is it actually like a thick layer of cement? Putting salt on concrete/cement makes it crumble and breaks up, and modern paintwork is salt resistant due to salting the roads, so i would wack on some salt and leave it for a night and see what the results are. its a fairly cheap idea aswell if it doesnt work. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted September 22, 2008 Author Share Posted September 22, 2008 I have an old wing panel with a lovely mix of cement slopped over it and baking in the sun as I write - so will try both in a day or two once it has set, and report back Quote Link to comment Share on other sites More sharing options...
Steve Hiatt Posted September 22, 2008 Share Posted September 22, 2008 Hydrochloric acid is what's used to clean concrete lorries, about 40% concentration from memory. Doesn't harm truck paint. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted September 22, 2008 Author Share Posted September 22, 2008 Yikes! Not sure I will try that on somebody else's vehicle I guess it is really just a super version of the same chemical process as the vinegar though! Quote Link to comment Share on other sites More sharing options...
Paul Humphreys Posted September 22, 2008 Share Posted September 22, 2008 I just used a jet wash on my car when it happened at work. But it had been on for a few hours and had "burnt" in the laquer by that time. Paul Quote Link to comment Share on other sites More sharing options...
pinny Posted September 22, 2008 Share Posted September 22, 2008 looking like clay is this a mortar/lime mix i think the lime will eat/corrode the layer of laquer as most paints on vehicles are water based and the paint on cement lorries is normally a 2 pack epoxy and isnt harmed too much by cleaners, acids ,brick clean as you prob know some bird poop will eat into the laquer. chris Quote Link to comment Share on other sites More sharing options...
ciderman Posted September 22, 2008 Share Posted September 22, 2008 I have used a mixture of red diesel and hydraulic oil on my tippers ,just spray or brush it on let it soak in for a couple of days and them jet wash it off . Quote Link to comment Share on other sites More sharing options...
bishbosh Posted September 23, 2008 Share Posted September 23, 2008 Cold chisel and lump hammer...? Am I helping Quote Link to comment Share on other sites More sharing options...
Lara Posted September 23, 2008 Share Posted September 23, 2008 Kettle Calk cleaner, The cement composition is similar to the calk, it does work but never tried it on paint! Lara. Quote Link to comment Share on other sites More sharing options...
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