Giuliano Bugiardini moved to the studio of Fra Bartolomeo. He completed certain works left unfinished by Fra Bartolomeo when he died. Some years later in Rome, while at work on the ceiling of the Sistine Chapel, Michelangelo sought Giuliano Bugiardini's services but later rejected them. Vasari mentioned Bugiardini assisted Michelangelo very briefly in 1508 with the painting of the ceiling of the Sistine Chapel. He painted a "Martyrdom of St Catherine" for Santa Maria Novella in Florence, based on Michelangelo's sketches. He also painted in Bologna in 1526–1530. His earliest known works of between 1495 and 1500 show the influence of his
Sistine Chapel layer of animal glue and "lamp black", all of the wax, and all of the overpainted areas were contamination of one sort or another: smoke deposits, earlier restoration attempts, and painted definition by later restorers in an attempt to enliven the appearance of the work. Based on this decision, according to Arguimbau's critical reading of the restoration data that have been provided, the chemists of the restoration team decided upon a solvent that would effectively strip the ceiling down to its paint-impregnated plaster. After treatment, only that which was painted "buon fresco" would remain. The only reproduction of the Sistine