Stainless Steel Boat Hinges Rusting

So the hinges in my new boat appear to be rusting. What it looks like happened is that when the hinges were installed, the SS screws marred the plating of the hinges. Water stays in the flush mount hinge pockets and the areas where the plating has been scratched are starting to rush. I noticed it on one hinge and checked the rest. Unfortunately it’s happening in every hinge location. I want to nip this in the bud to prevent the rusty water from bleeding down the deck and walls.

Now, the boat manufacturer tells me that stainless rusts if you scratch it. I’m no metallurgist, but it would seem like stainless steel (unless it’s SS plated (???)) is stainless through and through and doesn’t rust if scratched (I understand 304 will rust and 316 won’t) but this doesn’t look like SS rust.

I’ve also emailed the hinge manufacturer (Gemlux) to get their take.

So, should SS rust like this?

#frustrated