Like this.......
I'm not sweating the little metal tabs. They'll go away when I bring a new bumper home from the pound.
As to the rust, if it is only on the surface, just sand down til you hit clean metal, prime it, and paint it. I had something similar happen on my frame and I just used flat black Rustoleum rattle can.
The best solution? Nope. Cheap, though? Oh, yeah.
