same here, ive got a spot on my dovo too, i think metal polish would work but i suspect that im very very wrong about that so i havent tried anything. lets just see what the experts have to say.
NOOOO dont take metal polish to a new blade it is completly uneccesary. Try using something alot lighter like goo gone or simply try shaving with the razor again as normal then make sure to dry it properly this time and they might go away that way as well.