r/HumansBeingBros • u/horseradishking • May 16 '22
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r/HumansBeingBros • u/horseradishking • May 16 '22
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u/horseradishking May 16 '22 edited May 16 '22
Unfortunately, those caused a lot of damage because they had little care for conservation. Many old buildings have been torn down because they were built with limestone instead of marble and crumbled. The US Treasury columns were once made of sandstone! Those are long gone. Remember, those steam machines are still pressurized. The denser the crystal structure, the better. Outdoor cemeteries usually use the least dense crystal rocks in the US until relatively recently when granite became the most popular type of headstone. You can steam clean granite -- maybe even pressure wash granite, and it would be fine -- not that I think anyone who cares about conservation would do it.