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Shown here is the newly cleaned south facade (Credit: Photo by Jason DeCrow)

Shown here is the newly cleaned south facade of Grand Central Terminal.

Photos: Before and after

Shown here is the newly cleaned south facade
(Credit: Photo by Jason DeCrow)

Shown here is the newly cleaned south facade of Grand Central Terminal.

Shown here is the uncleaned East facade of
(Credit: Photo by Jason DeCrow)

Shown here is the uncleaned East facade of Grand Central Terminal.

Shown here is an ornamental doorway on the
(Credit: Photo by Jason DeCrow)

Shown here is an ornamental doorway on the cleaned south facade of Grand Central Terminal.

Shown here is the ironwork on the windows
(Credit: Photo by Jason DeCrow)

Shown here is the ironwork on the windows of the newly cleaned South facade of Grand Central Terminal.

Shown here is the ironwork on the windows
(Credit: Photo by Jason DeCrow)

Shown here is the ironwork on the windows of the uncleaned east facade of Grand Central Terminal.

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Shown here is the bottom of a column
(Credit: Photo by Jason DeCrow)

Shown here is the bottom of a column on the cleaned south facade of Grand Central Terminal.

Shown here is the bottom of a column
(Credit: Photo by Jason DeCrow)

Shown here is the bottom of a column on the uncleaned east facade of Grand Central Terminal.