Back here in the editorial department, we've argued fairly extensively over the ethics and practice of art restoration and conservation, which you can read more about here.
Currently, it's been left at the agree-to-disagree impasse, and luckily for those of us who feel that art restoration is good, the professional industry is on our side. Currently, the Cincinnati Art Museum is in the process of cleaning and restoring a Vincent Van Gogh masterpiece, "Undergrowth With Two Figures," and instead of doing it behind the scenes, is filming and streaming it for visitors to watch.
The cleaning will take five months, and is done using a microscope and fine tools. This Van Gogh, which has been in the museum's collection since 1967, is considered to be one of the artist's last great works, done shortly before his death in 1890.
Read more about the project here.