I read the article on this site by Serge on Body Filler Adhesion (very informative - thanks) and have a few questions. I'm using Glasurit 801-1552 epoxy primer. The TDS for the primer does not mention anything about a recoat window. Assuming that I prime the car and then come back anywhere from a few days to a few weeks later and apply Evercoat Rage Xtreme filler, how should I prep the primer? Just apply filler to primer? Sand the primer with P80 or some other grit before applying filler? If I sand the area to be filled to bare metal, any problem if I feather the filler into the primer around the repair area? How would the primer be prepped in this case?