As Fabiola Naldi writes: "A fundamental element of Blu’s work is the direct contact with the walls of the city, a privileged place and a perfect repository for testaments, actions, erasures and overwritings intended as the collective memory of a city that has become increasingly frenetic and less aware of what transpires around it. With only the use of paint and brushes, Blu, through distinct, raw, and concise strokes, creates parallel figurative worlds in which strange characters with one face infinitely repeated, transform into another story, another thought, another contemplation about the reality which they, and we, experience and endure. That is what these aliens and alienated beings are: the perfect testimonial pretext, reflecting like a mirror, the reality of those who, astonished yet fascinated, can indentify with them.”
Since 2000, BLU has painted walls in Italy, Spain, Germany, England, Argentina, Costa Rica, Nicaragua, Mexico, Guatemala, and Brazil. In 2006, together with director Lorenzo Fonda, he documented his work and journeys throughout Mexico, Guatemala, Nicaragua, Costa Rica, and Argentina in a piece called "Megunica”.
Some of his more noteworthy exhibits: Street Art, Tate Modern, London (UK) 2008; Santa's Ghetto, Bethlehem (Palestine) 2007; The Streets of Europe, Jonathan Levine Gallery, New York (USA) 2007; Super Fluo, Lazarides Gallery, London (UK) 2007; Backjump - The Live Issue #3, Kunstraum Kreuzberg/Bethanien, Berlin (Germany) 2007; Street Art Sweet Art, Padiglione d’Arte Contemporanea, Milan 2007; Urban Edge P4, Milan 2005.
Public walls: Memoria Canalla, Bogotà (Colombia), 2009; Influencers, Barcelona (Spain), 2008; Planet Prozess, Senatsreservenspeicher, Berlin (Germany) 2007; A Conquista do Espaço Sesc Pinheiros, São Paulo (Brazil) 2007; Via Lombardia 36, Bologna 2007; Walls Around Verona, 2006; Spina Comacchio, 2006; Fill in Good, Pesaro 2006; Sound Zero, Merano 2006; Outsides, Wuppertal (Germany) 2006; Urban Eyes, Belfast (Ireland) 2006; Segundo Asalto, Zaragoza (Spain) 2006; Poliniza, Valencia (Spain) 2006; Murales de Octubre, Managua (Nicaragua) 2005.