I have had good luck with Must for Rust on light rust. I also just tried a product called Rust Bomb it is made by the same company that makes Evaporust but it's a gel so you use it on things that are too big to soak in Evaporust. If anyone is interested I can post pics of a test area I did on my car when I get home tonight.
Also read this:
http://www.hotrodders.com/forum/secr...led-55679.html