Long ago, Japan Air Lines belly flopped one of their Boeing 707s into the (salt water) bay while trying to land at San Francisco airport. They almost made it, but if they had "landed" 50 ft or so closer to the end of the runway, they would have run into the end of the pier. As it was, nobody got hurt. They used LPS1 (many gallons of it) to rinse out and recover the engines. I've got a couple of cans of LPS1, 2.5 and 3 which is almost gone. I haven't seen LPS for a few years, but it worked good for me while it lasted.