What should I do to stop the rust and protect the bed of my truck?

The bed of my truck (1990 Ford Ranger) is starting to rust. The rest of the paint and body is in good condition. I want to stop the rust. Should I get a bed liner like Line-X or should I just get it sanded and re-painted or is there some other alternative

First Prep the bed. Do some sanding to get the rust cleaned as best you can, then go to the Auto store and get some rust killer it changes the composition and will inhibit the rust, be sure to get it underneath also. Then go get a liner sprayed in it this will be tons better than paint and the bed will last and last.

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