These are a few metal materials I made in 2018 for the Sport theme in Diabotical. The Sport theme was a vibrant and clean work-over of industrial environments for robot combat sports.
All of the painted parts of these materials could be color tinted for a large amount of variation.
These materials feature prominently in one of the maps I arted, Skybreak: https://www.artstation.com/artwork/9mXdKq