Rust remover?

WOW! Here is the post I was looking for:
http://www.forabodiesonly.com/mopar/showthread.php?t=84734&highlight=evapo-rust

And another one I found:
http://www.forabodiesonly.com/mopar/showthread.php?t=15359&highlight=evapo

I'm definitely getting some of this stuff, I have a sandblaster but why bother.