The materials as well as the names are the same when using them in Cinema 4D, the problem happens when exporting from Cinema 4D into the FBX format, then importing that in blender, and I'm not familiar enough with Blender to fix it there, nor do I have the patience for it unfortunately.
Viewing post in Untracked
I think I've worked something out for the Materials, I've got the first item (Barrel) to share the bluesteel material with the default pack.
See it here
If you get a chance hop on Discord and I'll explain the process.