There is a special place in hell for the person who vandalised Mark Rothko's painting 'Black on Maroon' at Tate Modern in 2012.
Here is a fascinating video showing the conservators painstaking process to restore the paintings surface.
Filmed over 18 months, this is the story behind the restoration of Mark Rothko's 'Black on Maroon'. Mark Rothko's 'Black on Maroon' 1958 goes back on public view at Tate Modern on 13 May 2014, following 18 months of intensive work by the Conservation team and colleagues across Tate.