hogwash... muriatic acid will etch the concrete if it's not rinsed properly but the cement won't turn into a puddle of goo just because you but muriatic acid on it.
check out the net, it's a common way to clean heavily soiled concrete. It's even a "use" listed on the bottle of acid.
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People are more violently opposed to fur than leather because it's safer to harass rich women than motorcycle gangs.
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