I was referring to the tech tier not quality. So primitive stuff, stone tools use stone, mid tier guns like double barrel use iron for repair, and high end stuff like pump shotty use forged steel.
Its an unneeded complexity that will alienate new players IMO. Sure some might like it, but at the core of the game repair is more of a oh crap my weapon broke and now I have to do something about it, not go on a full quest to find oil, make glue, get cloth, forge an ingot etc. Its just repair, its nothing glorious. Lets save the quest like crafts for stuff that is more game changing like vehicles and guns. Something you can feel the reward on, not just maintenance of stuff. This is a case where realism just stops people from enjoying the game, something a little more abstact will pay off. More time to fix your base, do real quests, loot, craft, farm, etc. Repair on blocks is simple, repair on all items should be simple.