You can see the results after some sanding, filling, etc. Soon the left side of the bumper so much better than the right, so the right side got a touch up too. And then I started on the middle. But the sun was going down, and I had enough of sanding the bumper.
It was spray painted under a dim garage light. In the morning I saw several imperfections, but I'll take care of them the next time it gets a respray.
Below is the photo before painting, and after the spray paint and 4 layers of clear coat.




 very carefully
  very carefully