I use Gami's and recycle them routinely, sharpening and re-sharpening until they can no longer be sharpened and still leave a reasonable tine on the hook. Be cautious about removing the least amount of metal possible while sharpening.

In the salt, sharpening that hook the very first time starts it down a corrosive path with no return. It will require you to sharpen more frequently. Watch sharpened hooks VERY carefully in the salt. They will rust MUCH faster than a hook straight out of the box. Over the course of a day's trolling, sometimes the entire hook point will just fall off, leaving nothing but a square stub. Pretty hard to hook a fish that way!