One reply so far from an organisation with some experience :-
Sorry to hear of your problem.
You mention that you polished the blade and then you mention a sanding wheel which are two different things.
If you indeed polished it, we polished many hundreds of this type of blade without any respiratory protection and none of us suffered any ill effects so I can only assume it was a coincidence.
If you used some sort of abrasive material you may well have created fine particles but whether the small amount you speak about would cause a problem I don't know but I doubt it, however I am not a medical expert.
I hope the problem clears up soon.
Followed by :- As far as I am aware there is no coating on the blades other than oxidation. Actually I made a mistake, we never polished blades as they were too hard, I was thinking of brass and steel cannon shell casings.
Still awaiting info from "Rockhard"
El G.