Here is a fun project I worked on during 3 ZBrushLive streams. Hard-surface and guns/assets are not my 'usual stuff' so it was cool to try different workflows. If you want to follow the process here are the links to the 3 streams:
Blockout: https://youtu.be/3gkHP7BmDas
Sketch refinement: https://youtu.be/scayVfF_CbY
Polishing and details: https://youtu.be/kCVHD_ZNihg