Peter L. Peres wrote:
>
> Just keep in mind that most 'supermagnets' need a serious coat of paint
> (better epoxy paint) because they are very allergic to water (even vapor)
> and contain a lot of environment-unfriendly metals (environment-unfriendly
> as in you-unfriendly when you are sloshin around the vehicle in the
> water). I have never seen anything rust as fast as a supermagnet. It went
> from dull gray surface to at least 1 mm deep rust in 45 minutes after the
> paint was accidentally scrapped off (at 80% humidity and 30 degrees C).


Hi Peter, thanks for the magnet tip. I had another
thought, what about a water pump?? More like a jetski
than a propeller sub. Any 12v water pump should
already be sealed between the motor and impeller,
or even a car engine water pump is sealed and has
a shaft ready to drive. I don't think they would
handle any real deep pressure, but its worth a
mention.
-Roman

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