Anybody fill the area between the trunk / fenders?

Darnut, Looks like to me a little more foam, sand paper and paint and you'll be good for another couple of hundred miles. I looked at a car about a year ago where the guy had used Hilti construction foam skim-coat primer and paint on the lower rear quarter panel. When I was looking over the car something just looked wrong when I was looking down the side for waves in the sheet metal. I wasn't sure what looked out of place but it just wasn't right. When I pulled out the magnet he told me what it was and said the rocker panel was just too expensive and when this one got beat up all you had to do was carve it out and apply some more foam and sand to shape, and unlike bondo it wouldn't crack and fall out. I will give him this, the Hilti foam has a very low moisture retention and is some of the strongest foams in a can you can get. That experience really made me look more carefully while I was searching. Remember once it's done your name is the one on it.