Ospho????

at suggestins in here, trying some of this phosphate acid derived stuff. I read directions and even contacted the co for more info ( waste of time). I tried it as directed, dried overnight, I did spot washed with water and not, lightly run scotch brite where it dried leaving some of the white phospahate power, I will use epoxy primer on next spot.
the first couple spots I used just an oil based equipment single stage enamel.; good adhesion, but places where it wrinkled. just wondering for those that have used it what their experience has been. this car had some serious surface rust and pitting, that's why I used it. some might just say sand down and use self etch primer.