Fade To Grey.

A marble bust in the process of being cleaned with a conservation grade steam machine.
We clean one side of a bust first and then take photographs to document the 'before and after' look. Known as a half and half photo or 'a Steve Strange' in the trade.
For those of you who are not up on '80s music, Steve Strange was the singer for the band Visage (known mainly for their only hit 'Fade to Grey'). He would always be sporting some outlandish make-up which occasionally meant one half of his face would be a different colour from the other.
Lesson over.