I have this 33 coupe that is in pretty good shape. It was Redi-Stripped (remember them?) years ago and left in the phosphate wash, with no primer. It still has the grey surface color, with very light surface rust in a few areas. The pictures show the cleanup started with a Contour SCT and Scotchbrite, as well as contrast between old surface and new. So what's the next step? Ospho? Metalprep? Self etching primer? Wipe with thinner and epoxy prime? I know, like doctoring over the phone, but I got no experts around here. Thanks much!!