The Stovebolt Site Forums The Shop Area Paint and Body Shop phos acid, how should it look when done

Information there is suspect. They state that it must be applied over rust for proper adhesion... wrong, and NO idea where they came up with that. Can't speak for the others but the Eastwood product can be applied to any surface, over or under bondo.

I've stripped my cab down to bare metal and painted it over with Rust Encapsulator. No chipping or any signs of poor adhesion.