Here are two products I use religiously. Mostly on my boat trailer and anything that might come in contact with the salty sea of cortez numerous times a year. Things come apart in the same condition they started out. You can melt the stuff in the tub in the microwave and paint it on or dunk parts in it. I also use it on shackle bolts and springs and lugs and nuts.

My opinion is to forget the products that basically convert a relative small amount of surface rust and then seal it off. Since these coatings are brittle , any breech in the coating allows the rusting process to continue.

These products remain flexible , hot or cold, and keep salt and water from ever coming in contact with metals in the first place.

http://www.westmarine.com/webapp/wcs/sto...5&langId=-1


http://www.westmarine.com/webapp/wcs/sto...0&langId=-1