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singersp
05-19-2013, 10:42 AM
Roof of new Vikings stadium is self-cleaning

Roof of new Vikings stadium is self-cleaning | ProFootballTalk (http://profootballtalk.nbcsports.com/2013/05/18/roof-of-new-vikings-stadium-is-self-cleaning/)

Minniman
05-19-2013, 05:25 PM
Cars left out in the rain look shiny when wet, and they look like crap once the rain dries up.

Dust, dirt, chemicals, droppings, and other elements will dirty the roof up pretty quickly.