Sup org, I have done a little searching but I have not come across any thread with much details but I have seen one that someone recommended to use CLR (Calcium Lime Rust) on their engine bay but another member said don't use it there because it is flammable. I was wondering if anyone tried using it for their rear beam or undercarriage to remove rust and paint over. There are very few shops that will work on an undercarriage.

Trying to slow down the aging process of the 4th gens...

 

http://www.jelmar.com/msds/CLR_MSDS_eng.pdf

Says its an "Aqueous Acidic Cleaner". So basically it's a weak acid mixed with water. The MSDS says its non-flammable.

 

Ok so I will try it in a spray bottle for rust under the car and see what happens...hopefully not weaken it too much.

 

Be very careful around bushings and rubber brake lines. Rinse thoroughly.