Rust elimiator for frame
 

Has anyone had any experience with Ziebart's 'Rust Eliminator' process? This isn't their 'Soundproofing' or 'Undercoating', but more of a rust converter process similar to the 'Por-15' product I've read about in some threads. I want to have them do the leaf springs, frame, etc., where it's starting to show some rust. Any advise would be appreciated!:D

Ziebart's 'Rust Eliminator'
 

i copied this and read about it on their site, sounds good,,but gm claims u dont need it. its not rust treatment but preventer

i wonder what gm would say about your visible rust?

my 07 had frame rust,AND one torsion bar had coating corroded off in about 4 inches, very bad for t bars.

i used a rust treatment like "extend"

I think it's the same principle as 'extend'. It chemically reacts with rust, and converts it to a paintable, black surface. http://www.itkillsrust.com/index.html
I'm sure GM wouldn't cover any surface rust on chassis components, as their only 'rust warranty' seems to be 'rust through' on body panels.