His family later moved to São Paulo, where he studied at the prestigious Colégio Dante Alighieri; despite being an excellent student, he would, however, be expelled before he could graduate from high school because of a text he wrote, considered "indecent" by his teachers.

He later met poet Robert Lowell, serving as his secretary, as well as Paul Goodman, with whom he developed a strong friendship and suffered an everlasting influence from him.

The show, that happened at the Museum of Modern Art of Rio de Janeiro and was backed by the UN, celebrated the 25th anniversary of the Universal Declaration of Human Rights, and also counted with the presence of Chico Buarque, Dominguinhos, Edu Lobo, Gal Costa, Gonzaguinha, Johnny Alf, Luiz Melodia, Milton Nascimento, MPB4, Nélson Jacobina, Paulinho da Viola and Raul Seixas, among others.

[4] In 1988 Mautner took part in a short-lived "joke side project" formed by then-Titãs member Arnaldo Antunes named Vestidos de Espaço, which also comprised Branco Mello, Charles Gavin, Paula Toller of Kid Abelha and record producer Liminha.

The band's only release before their demise in the following year was a 7" single with the tracks "Pipi Popô" and "A Marcha do Demo"; the latter was included in the Titãs compilation album E-collection from 2000.

[5] In 2002 Mautner served as a guest musician on synth-pop band Metrô's third album, Déjà-Vu, providing violin and additional vocals for a track.

In the same year he collaborated with Rogério Skylab in his album Abismo e Carnaval, writing the lyrics and providing additional vocals for the track "Palmeira Brasileira".