just get more oil leaks...
I used a similar product, a conversion coating, from a local auto parts store(same stuff) that changes the iron oxide to a black oxide, which is non-reactive, thus ending the rust...anywho I used it on several occasions when I had a body shop, my best testimony is when I used it on my '57 chevy suspension that was pitted pretty bad. I cleaned it all to bare metal, sanded/brushed/grinded off all the rust that I could, sprayed it with the conversion coating, scuffed it, primed it then sprayed dupont's imron on it...
I kept the car for ~ 10 years and never had a problem, I would drive it anytime, even on salty roads in the winter...
the key is proper prep...
the imron was brutal stuff to spray, but it is tough...a really good choice for a topcoat, if you can find someone that will use it...
