Educate yourself on corrosion (just search the forums here). Given it is a coastal unit, depending on how it's been kept and maintained, you're likely to find some corrosion. It's just a fact of life, but can be controlled for the most part, you'll notice it more than anyone else. Our unit was inland until we purchased it. A few months next to the ocean and I started to see the corrosion happen. Just keep a can of corrosion x (or similar) handy and use it on occasion, it will arrest the progression.