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Old Posted Mar 26, 2008, 5:42 AM
Pru Pru is offline
Join Date: Jun 2007
Location: Chicago
Posts: 86
Originally Posted by bnk View Post
Looking back 50-80 years or so the buildings had an awefull amount of soot on them, most likely due to coal burning. Just look at the older white buildings like the Mart and compare them to today. Were they washed or were they cleaned by nature?
They were sandblasted if I'm not mistaken. (Used to see that a lot back in the day; haven't seen that done in a long long time; I guess there's no need anymore.)
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