As per the title. Many Special Material types are often only available on named loot ever since they were stricken from the loot tables. Crafted Armors, Shields, and some Weapons (especially Quarterstaves) could greatly benefit from having such an option - and it could restore some desirability to acquiring old & outdated named items too ^^
Is there a tech reason they can't be used? Is it a decision related to Base Damage Profiles on named weapons? Concerns over Crafting on a triple slot Trinket or Shield? Something else? Genuinely curious. My interest in craftimg is relatively new, so if this was a discussion topic before I missed it; any informative link would also be appreciated.