Started with a basic sketch. Small details would later be revised
Added detail and fine-tuned a few elements
High Poly almost ready to bake
Utilized the low poly meshes I originally used to make the high poly and what I didn't or couldn't make in low poly I retopologized using 3D Coat
eventually added some decals and refined the weathering
1'st pass at materials using 3D coat. I like the white armour look with industrial yellow as an accent colour.