Discoloration

Several areas of the epidermis of the face show a peculiar yellowish discoloration.

In the first half of the 20th century, the canvas was covered with protective varnish that over the course of decades caused discoloration.

Nothing of major concern has been discovered. Speaking with reporters, Flight Director Tony Ceccacci said the images do show a white splotchy area on Discovery's right wing. But Ceccacci noted that he and other inspectors spotted the discoloration nearly three weeks earlier — and concluded it was most likely the result of bird droppings.