Early on the AM of Sun 17, Feb a heavy storm rolled through and really churned up the sea (including Bloody Bay at CN). In addition to the multitudes of seaweed and sea life (many, many starfish) deposited on shore, there were man-made artifacts as well.
Throughout Sunday AM people enjoyed the amplified surf. On Monday AM, we saw people recovering several sunglasses, a visor, a ball cap, even a waterproof watch (we're guessing it was b/c the new owner said it still works). (There were also tens and tens , if not hundreds of the hard plastic cups beach drinks are served in - presumably from drinking guests that wanted to ride the surf and got slammed - the staff were recovering them).
Anyway - we saw a guy in a wet suit in the water with a metal detector. Don't know if he was a guest, but presume so, and he didn't bother us in the slightest and would guess his chances of finding something unique were good in those circumstances.