A question for the ages. I’ve got an entire truck that needs rust prevention, so what best to use? I watched a friend use Eastwood products on his Sprite (English sportscars of the 60’s rival US vehicles of the 70’s for their ability to spontaneously dissolve), and thought they worked pretty well. After some basic research, my original thought was to use Encapsulator in an aerosol can, but as I dug into the online materials a little more, I came to understand that Converter was better suited to my needs. Converter is a two-part acidic paint that converts rust to an inert oxide, while Encapsulator seals rust off and keeps it from spreading. Yes, I need to seal it off, but Eastwood says Converter is better for heavy rust, which is what I’ve got. Then, as I hovered over the Add To Cart button, I saw that they offer a quart bottle for only $6 more than a 12oz. aerosol can. Such a bargain!