For not worrying about imported materials being redundant. I wrote na_cleanMaterial.mel. It figures out how to reassign imported object to materials that are already on scene. It uses naming conventions. There may be some bugs and better approaches but hope it is helpful. I also posted the code I wrote for this video on my website.

Thank you for watching!

Cheers
-Nate

Loading more stuff…

Hmm…it looks like things are taking a while to load. Try again?

Loading videos…