Intractable conflict coupled with deep poverty often reinforce socio-psychological conflict-repertoires. Transforming repertoires can contribute to sustainable peace. Increasingly, development NGOs utilise arts-based programming to provide community spaces for exploring peace-oriented repertoires. Yet arts-based processes are poorly theorised in the development literature. We present a case-study arts-based peacebuilding programme embedded in intra-ethnic Rakhine asset-based community development (Myanmar). Arts-based components help build comprehension and retention of peace concepts, and motivation/confidence to apply new knowledge to daily interactions, supporting the overall aim of shifting conflict-repertoires. We show art-based activities as reflective learning processes produced modest-yet-significant shifts in repertoires, thereby contributing to sustainable peacebuilding.