Wet Paint: a layered history is the work of Mari Kroin; uncovering history through exploring the layers paint on NYC Subway columns.

Wet Paint: a layered history is the work of Mari Kroin; uncovering history through exploring the layers paint on NYC Subway columns.
There are 472 stations in the New York City subway system. Each stair is different based on location and station type. Here are the different typologies.
Sub operimentum, the MTA sidewalk grate, covering for the subway.