this fender was a pain in the butt. Rusted through with a softball sized dent. Popped most of the dent out and even did some old school heat gun / ice work to tighten the metal back up, then painted with a rust stop, and glassed with what my buddy Duey calls Kitty or Tiger hair but is just Bondo hair - short strand fiberglass that mixes just like bondo and hardens up QUICKLY - same stuff I've been using to fix the dash and do the speaker C / A pillars.