Once shipped, the maker has no control over the ammo. So any blemishes that happen from poor storage or shipping cannot be blamed on the maker.
It is unlikely there is anything functionally wrong with the ammo due to the spots, but its premium ammo, sold (I assume) for a premium price, and if it looks like crap, you aren't getting what you paid for.
I would suggest contacting both the maker and the distributor and letting them see what you received. The maker will, most likely, (and quite rightly) say it didn't look like that when they shipped it.
The distributor MAY blame it on someone else, or try to, but they should admit what they sold was finish damaged, and perhaps give you a partial refund or future credit because of that.
They may tell you "its just cosmetic, nothing to worry about..etc.," but if you are paying for top end, you should get top end, not blemished.
I would hold off shooting any of it, until after I heard from the maker and the seller, incase you are asked to send it back for a replacement...
Or, you can just accept it the way it is, and use it...
Good Luck, and let us know what way you decide to go.