How does one ethically care for a global collection shaped and maintained within a colonial context? How do we address institutional responsibilities in a way that is transparent, rigorous and reparative? This article discusses on-going conservation research at the University of Cambridge Museum of Archaeology and Anthropology as part of a five-year storage relocation project. Moving beyond key vocabularies and abstract critique, this work examines the potential role of conservation in documenting and interpreting evidence for damage, displacement and erasure related to methods of colonial knowledge production and historic museum practice. The work includes a consideration of the language used to distinguish modifications resulting from museum practice such as the application of pesticides; monitoring change over time; the expectation of object longevity; and the potential consequences of disrupted traditions of maintenance and knowledge exchange. The article concludes by reflecting on the ways in which technical vocabularies, documentation and decision-making processes can shape and even improve the ways in which these collections are studied, valued and utilised by a diversity of stakeholders.