The did the same at the Brandenburg Tor [1] in Berlin for which the rabble was sent to prison. They claimed it was 'the fault of the cleaning company that the c

The did the same at the Brandenburg Tor [1] in Berlin for which the rabble was sent to prison. They claimed it was 'the fault of the cleaning company that the colour did not come out because they waited too long before trying to get it off' but that excuse did not fly with the judge. So no, it is not given that this colour 'will wash off with the first rain', that depends on the porosity of the stones. The Brandenburg Tor is made of sandstone which is very porous so that soaked up the colour like a sponge. I assume Stonehenge is made with granite blocks which are likely to be less porous but the outside layer of those megaliths are likely to be covered in lichen which is likely to soak up the 'wheatflour-based orange colour' they used. [1] https://apnews.com/article/germany-brandenburg-gate-climate-protest-cleaning-eb30718992d2c573ada9d91940e70ea2 https://apnews.com/article/germany-brandenburg-gate-climate-...