Ms. DeBris (hee-hee, that's funny) should probably test that stuff with a chemical sniffer, auger cultures, and a Geiger counter to avoid occupational hazards. Cool concept, though. Marine DeBris, indeed.
I heard on the news that all the debris and trash from Japan's tsumani will reach Hawaii in 2 years and then to California less than 6 months after that! This artist is going to have so much material to work with! UGH!