The local government, residents, and media outlets in León, Mexico, treated graffiti as a disease until the state began sponsoring artistic graffiti through a program of its own. In Voices in Aerosol, the first book-length study of state-sponsored graffiti, Caitlin Frances Bruce considers the changing perceptions and recognition of graffiti artists, their right to the city, and the use of public space over the span of eighteen years (2000–2018). Focusing on the midsized city of León, Bruce offers readers a look at the way negotiations with the neoliberal state unfolded at different levels and across decades. Issues brought to light in this case study, such as graffiti as a threat and graffiti as a sign of gentrification, resonate powerfully with those germane to other urban landscapes throughout the Western Hemisphere and beyond. Combining archival work, interviews, considerations of urban planning, local politics in Mexico, and insights gained by observing graffiti events and other informal artistic encounters, Bruce offers a new lens through which to understand the interplay between sanctioned and unsanctioned forms of cultural expression. Ultimately, Voices in Aerosol builds a strong case for graffiti as a contested tool for “voicing” public demands.