The stuff that i used that I actually had some success with (I personally do not like Rustoleum), was a product called "Extend" by Duro. It is now branded under Loctite under the same "Extend" name, and it actually worked well for me.

This product isn't really a paint or primer. It is kind of a chemical stain or??? I'm not really sure how it works. You brush it on like water and it later turns into a black coating. I don't know if it etches, cleans or entraps the rust, but it worked really good. It doesn't need to be primed after you use it (but you can), it dries and looks like primer, but comes out really wet.

just wanted to know if you guys out there had called the rustguys and if so how where you treated ... my experience was not a good one specially with a so call " Mike ".... no professional skills, quality, etc...and how he spoke slurring his words sound to me he was under the influence of something or may he had a nasty day and decide to take it out on me. my friend told me about the product and he swears that it is awesome it does what it states..for now they lost a customer who knows in the future if mike get his you know what together they might get more customers