I use several different sizes of this:
https://www.canford.co.uk/TECHFLEX-BRAIDED-SLEEVING-Split-Spring-Wrap
(from a differnt supplier but these guys look much cheaper 🙂 )
All my external wiring on the Printer and CNC uses this and the effect is great.
For the Delta's main loom I use a softer and more flexible version (sorry, no link) and it is really nice being able to carefully re-run a single cable without disturbing the rest.
35-741_01.jpg