Caught myself hammering a filler over bare metal on a '94 Civic last week in Fresno
I'd been skipping the epoxy primer for years because it saved me maybe 20 minutes a panel and the jobs seemed to hold up fine. Tipped me off when a customer came back after 14 months with a bubble the size of a quarter on his fender, so now I'm wondering how many of those I've already put out the door.