With new military aircraft adopting cleaner and better materials and surface treatments, their sustainment presents new challenges for DoD. Some of the new materials and coatings require different technologies for flaw detection and repair, while others require greater emphasis on process control and surface cleanliness. As DoD moves into the sustainment phase of these new programs, it is imperative that the most effective non-destructive inspection (NDI) methods be defined and repair technologies be developed and approved that are clean, cost-effective, and achievable at the depot and operational levels. To address the various technologies and issues related to the use and sustainment of clean materials on new aircraft and some legacy systems, SERDP and ESTCP sponsored a workshop that brought together original equipment manufacturers, users, DoD experts, and vendors. The objectives were to exchange information on the development and implementation of new surface engineering technologies and to define future requirements and technology gaps requiring additional research and development. For the full workshop report and briefings, visit the Agenda and Workshop Summary page.