In 1775, he joined a boycott against the nude art classes, led by Giovanni Battista Mengardi, who objected to the length of time the models were required to pose. All the participants, including Cedini, were expelled. Despite this, he and most of the others were readmitted, apparently because of pressure from the University of Padua, which supported their position.[1] He later became a Professor there, from 1784 to 1797. Among his students were Giuseppe Bernardino Bison, Giovanni De Min and Lattanzio Querena.
He retained his membership in the Accademia after purges conducted by the Archduchy of Austria in 1798. He served as Director in 1802 and was reconfirmed as a Professor in 1804, but Venice became part of the Kingdom of Italy in 1805, and after 1807, he was dismissed, as he lacked the necessary Imperial patronage.[1] He died in Venice in 1811.