I've now found few master smiths that produce Fine items. I actually don't mind it, as they still can produce the more complex items, I.e. skramasaksi, broad sword, and so on, according to the cultures knowledge of the items.
Maybe the local goethite can't be used to produce Masterwork items: the smith is master at forging, but maybe not a master bloomer.
I've not wandered in Sartola, but Driik and Reemi Expert smiths do not offer skramasaksi, only Master smiths do. And yet somehow in the world there are Decent and Fine skramasaksis.