RE: GP Seawind Electric from saltwater?
I would try almost any other seaplane than the electric seawind, Mine always ends up with water inside, the cockpit overhangs at the front, so any little wave that gets near there makes in in. Also, the tandancy to nose in on a skipped landing has made it my number one plane for needing a boat rescue. They fly great in the air, very quick and smooth, but landings can get hairy unless everything is just right.
I converted a Twinstar a while back, and that is much more forgiving, and stays dry better
My seamaster stays very dry inside, but it is balsa, so once salt did get in, you would never get it out.