If you do treat some rust with Ospho and use their epoxy primer be sure to neutralize the Ospho or just don't use it. It can have a reaction and not necessarily immediate.
I think their products are top notch and they have great service and tech support. I have used lot of TCP Global products but they have changed a lot of stuff. I pretty much use economical PPG Shopline acrylic urethane topcoats as I don't care for bc/c. I know I am just old and old fashioned!
