That's artist Marc Quinn polishing his latest creation: a golden statue of Kate Moss, who he called a "modern day Aphrodite," in a particularly limber pose.
It is the largest gold statue made by man since ancient Egyptian times, weighing 50kg, around the same as its subject.
Artist Marc Quinn, whose previous works include the sculpture of a pregnant woman with no arms or legs on the fourth plinth in Trafalgar Square, said Siren cost £1.5m to make, £1m of which was for the gold.
What does Kate Moss think about all of this?
"For Kate, she thinks it lifts her into a mythical level," he said. "I think she very much loved it because she understands the difference between her image and her self.
"The sculpture is really about whether we make images or they make us. It's about trying to live up to impossible dreams and immortality."
There was a lot of fuss made over the appearance of the sculpture on the fourth plinth. Opponents may like to think that it was eventually removed due to their protests. However, the Royal Society of Arts has never kept a statue on the fourth plinth for very long. Wikipedia has a more detailed & explanatory article on the "Fourth Plinth Project" in Trafalgar Square. http://www.en.wikipedia.org/wiki/Trafalgar_Square
His explanation was a bit disappointing: Kate Moss is kind of a mystery, a 'sphinx', and the iconic love goddess of our time, whose image is 'contorted' by the media because of her drug use, boyfriends, etc.
Personally I see a sculpture of a confident, proud woman, who is not afraid of controversy, and owns her sexuality. She reminds me of hindu goddess Kali as well as Aphrodite.