I have a 76 elky that I am restoring, and I'm working from front to back, I am curently on the interior, and I need some tips or advice on molding fiberglass, I'm useing a fiberglass resin and hardener from Bondo. I am trying to mold a consol and mold my stereo into my dash, I can never get it to set right, and I always end up sanding the fiberglass away. Any help would be nice.