Applies to:

• MacBook Pro (Retina, 15-inch, Mid 2012)
• MacBook Pro (Retina, 13-inch, Late 2012)
• MacBook Pro (13-inch, Early 2013)
• MacBook Pro (15-inch, Early 2013)
• MacBook Pro (13-inch, Late 2013)
• MacBook Pro (15-inch, Late 2013)
• MacBook Pro (13-inch, Mid 2014)
• MacBook Pro (15-inch, Mid 2014)
• MacBook Pro (13-inch, Early 2015)
• MacBook Pro (15-inch, Mid 2015)
• MacBook Pro (13-inch, 2016)
• MacBook Pro (15-inch, 2016)
• MacBook Pro (13-inch, 2017)
• MacBook Pro (15-inch, 2017)
• MacBook (12-inch, Early 2015)
• MacBook (12-inch, Early 2016)
• MacBook (12-inch, Early 2017)
  And likely (but yet to confirm):
• MacBook Pro (13-inch, 2018)
• MacBook Pro (15-inch, 2018)
• MacBook Air (Retina, 13-inch, 2018)

Component affected:

• Display coating

Symptoms:

• Unremovable stains or wear on the LCD coating

Apple Repair program:
Internal only.
This repair program was never published on their website and only mentioned in Apple internal documents.

Links:
Staingate.org