Yeah... Ok, but I'm not looking for merely a cosmetic fix. The rust on the radiator support needs to actually be repaired since once that bushing mount fails, that body piece might drop a little and sit right on the frame, instead of having bushings inbetween. Furthermore, the fuel line and brake line rust will kill functionality of those systems eventually (well, fuel line is already toast). The truck needs fuel and it needs to be able to stop.
I was thinking a hefty dose of POR-15 for the entire frame and any of the other rust spots. For those who don't know, POR-15 is a nice rust-inhibiting compound/paint which will completely arrest rust, and can even cure in humid environments. I believe it was initially formulated for marine applications. I've used it on a number of vehicles. Google it. It's not just paint.
The radiator support up front I'll probably completely replace. partstrain.com has a new one for $165. I'll try the junkyard first, though. But spray paint certainly would NOT cut it.