I want to restore it to its original colour which was metallic gold. Before I repaint, I should deal with the rust. It seems to have some rust holes where water is kicked up from the rear tires of the car. The box is completely steel. There is no insulation or wood inside and the steel is somewhat thick. I am wondering if it can be ground down to bare metal and filled in like we would with car sheet metal? If so, are there any resources out there to help with that?

