In 1991, Sean was awarded a three-month artist residency at Na-Bolom, in San Cristobal de las Casas, Chiapas, Mexico.

Na-Bolom is a non-profit civil association founded in 1950 by Danish researcher Frans Blom and Swiss photographer Gertrude Duby. The Bloms were amongst the first outsiders to come into contact with the Lacandon Indians hidden in the midst of the dense Lacandon rain forest in Chiapas. The Lacandones are the only people who managed to escape Spanish colonization by retreating far into the dense jungle.  Frans and Trudy established very close ties with the Lacandones. Having bought a large colonial house in San Cristobal de las Casas, in 1951, the Bloms decided to turn it into a museum and research centre. Under the banner of Asociación Cultural Na Bolom, the non-profit organization functions as a research centre, museum and works to protect the rain forests of Chiapas.

During his residency in Chiapas, the artists witnessed a myriad of political and social tensions including, deforestation, poverty (Chiapas is the poorest state in Mexico), the marginalisation of indigenous populations, racism, forced disappearances, forced displacement, torture, threats of violence intimidation and death,

'Y Despues De Colon, Coca Cola' (and after Columbus, Coca Cola) is a series of painted images on found car parts, completed during the artist residency at Na-Bolom. The images were inspired by Mayan hieroglyphics documented by the artist on excursions to the Mayan archaeological sites of Palenque, Toniná and Bonimpak.  The artists also travelled to the Lacandon village of Nahá, and to other indigenous communities in and around San Cristobal de las Casas. The images were created in response to social and political events witnessed by the artist during his time at Na-Bolom. The works was exhibited at La Casa De La Cultura, and at Na-Bolom, San Cristobal De Las Casas, Chiapas, Mexico.