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).

Peter

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