rare ingots - what are they for?Follow

ok, so lately ive been making some rare t4 armour and each time i refine a feysteel raw i get some feysteel ingots back, ive been given conflicting reports regarding these ingots, some people seem to think that there is no use for them while others say that they are used to make arrows or some such, can anyone point me in the right direction and tell me just what exactly they ARE used for if anything?

cheers.