Well can't you take the hammer with a pcik at the end and hit it from the inside and out? to create that crease again.
Well learning from autobody... hahaha a chop job would be to grind it down and bondo it and sand the bondo into the shap of the fender.
OR take a drill and drill a hole in the thing, and pull it out, then shape it, and bondo, and paint. Lots of work but...probably worth it.