: I've seen Rob's magnetic hatches, they are very cool. My only concern at this
: point is how they will stand up to salt water over the long run. The
: nickel plating is not enough to give any long term corrosion protection.
: Anyone have any experience or specialized knowledge about the corrosion
: resistance of rare earth magnets.

: It might be worth using more magnets if you could keep them fully
: encapsulated in epoxy.

They definately have to be sealed from water contact. I did have one magnet rust.