From the BBC: Physicists have applied the same laser techniques commonly used for tattoo removal to clean several famous works of art, including wall paintings.
Laser cleaning is well established for stone and metal artefacts already.
It has now been successfully applied to the wall paintings of the Sagrestia Vecchia and the Cappella del Manto in Santa Maria della Scala, Siena, Italy.
The results are described in the journal of the American Chemical Society.
A team led by Dr Salvatore Siano at the Applied Physics Institute-CNR in Florence, Italy, studied the results on several works of art.