Hehe, I'm gonna post stuff about my Prelude again, sorry guys, but I'm a Sentra fan, but a Prelude owner, but it's relevent.
The guy from the Honda dealer says "If your key do happen to drown in a spilled glass of water, take it out of the water, dry it off as quickly as possible, other wise, when it gets shocked, the chip will be gone, and we'll have to order a new one from Japan, which takes about a month"
First, there are no electrical current within the key of course, so it won't get shorted by itself, unless, you drop your battery in to that water too, or gave it some hyper static shock... in that case... it could happen with or without the water.
I won't know about that salt thing, but salt is for food, not for cars... I wouldn't want salt on my Sentra (when I get it)... (oh yah, road salt, well... do the best you can to spray it off at the local car wash)
As for that seat on that vette??! HAHAHA... that's the funniest thing I've heard

Is there a combination code you gotta do with the seat?

JUST KIDDING, but here is what I wanna know: What if I'm really tall and I need my seat all the way to the back (I know being too tall for those big sports car are nearly impossible like my Lude, but for civics, z3, s2000, or the sentra for that matter, I need the seats all the way to the end...)
Anyway... why would you wanna get a system like that? just get a good decent alarm system that has fuel line control, it cuts the fuel line if the alarm is still there.
Oh, here's another question, why would he tell you this so you can spread it all over the car wash and the internet about his little "security" thing? hahaha.
Anyway... enjoy my thoughts!
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Jay
1997 Honda Prelude Type S
Getting a Sentra SE Sport soon!