I just put a good coat of Ospho on my frame the other day, and it has not only protected the nice shiny areas, but in the crevices it has turned the rust I couldn't get to into a black subtance.

Yes, the active ingredient is phosphoric acid. I have used Ospho for years in the marine industry to kill rust on engine mounts, blocks, transmissions, etc. I also did the entire interior surface of my pickup truck bed with it before I put on rustlock primer. No rust has ever come back through.

Ospho is like $ 7.00 a quart, and I used about 3 oz to do the entire frame on the T the other day.


Don