“Biro said that he was using a scalpel to scrape away a previous restorer’s excessive overpainting, in an attempt to discern more of the fingerprint’s characteristics. A lot of money lies in obtaining this kind of information, he explained, which is why he had to suspect everything, and everyone, of deception.”
David Gran, “The Mark of a Masterpiece”
(Photo from “Close Examination” at London’s National Gallery, via The New York Times)