This prop served as a small test case for mesh decals inside Unreal 4. Was quite a fun process, maybe I will do something bigger in the future.
Concept by
https://www.artstation.com/artwork/oL23B
Decal heightmaps are taken from
https://www.artstation.com/jronn/store/kl/zbrush-sp-325-hardsurface-height-alpha-tutorials-vol-1