There are a couple of things going on here… This is the edge where the power bulge meets the flat section, about 12 inches back from the tip on the LH side. This is a buckle from a minor collision that was just crudely knocked down and smeared with filler. This is the toughest area to work on a center section, but we’ll make it perfect again. You can also see evidence of heavy pitting from a bare rust patch many decades ago.