Yeah, I`ve done both strut towers and my driver side rocker ( or rotter) panel. One small spot in the middle and a large one at the rear wheel well. I actually had to get some of the wheel well done, too. Time to do the passenger side which is really minor. But I don`t think they cleaned the flux off when they welded the roof, because when I took the upper door trim off, I noticed waves in the paint. And when I took a carbide grinder to it... more rust. The joys of old cars.