Allow us to revert x quantity of created items, back in to their material components. example; allow us to turn 2 sealable scroll 1's in to 1 blank scroll.
I'm ignorant to many of the artisan skill mechanics, but I imagine they work similarly to fuinjitsu which I am currently working on. While trying to get my skill up to lvl 5 to unlock the tier 2 scrolls needed to get spells past lvl 19, I ended up with around 12 extra tier 1 scrolls I couldn't do anything with. I tried to trade a few of them off for blank scrolls to lower level players, but finding people to even make the transaction for a measley 4 was not easy. Allowing players to salvage crafted items for material components would not be cost efficient compares to trading players, but should be an option to make SOME use of the inevitably useless items you outgrow.