Tomaso Montanari, a professor at the University of Naples Federico II, has spearheaded a petition signed by more than 100 art historians who oppose the process, including experts from The Metropolitan Museum of Art in New York and The National Gallery in London. Montanari told ABC News that Serafina's process is not transparent and is based on sensationalism rather than science. "It is just propaganda," he said.
Moreover, Montanari said that the paint beneath Vasari's fresco could be ornamental decoration, or paint used by other artists in Florence during the same time period. And because of Da Vinci's experimental painting technique, it's unlikely that "The Battle of Anghiari" would be preserved for so long.
Florence Mayor Matteo Renzi told reporters they may decide to remove parts of the Vasari work which were restored in the 19th and 20th centuries in order to look behind them.
"We are sure that the 'Battle of Anghiari' is behind" Vasari's work, he told the Associated Press.