Rust Converters

[fgpenna]

Hi

I am about to start a restoration of my 69 280SL.  I have been looking into using rust converter on areas of the frame and under carriage prior to painting it.  i was wondering if anyone knows which product is the best to use.  I have done research and found a site that tested various products and claim that the Rust-Oleom rust  product hold up the best.  Any thoughts or recommendations?

Thanks
Frank