Most times the cut and polish is to save my own butt after doing a less than perfect job. Usually working with wet sanding from 1000 out to 2500 grit paper followed by 3M Perfect-It compound will fix most any boo boo. I had a nice little "uh-oh" right in the top part of that bracket when I first cured the powder and before wet sanding and polishing it out. The guy had some pretty high goals for the project so nothing less than perfect would have been appropriate. It all turned out okay in the end and one of the powder suppliers wound up using pictures of it for their website coincidentally.

PERFECT-IT RUBBING COMPOUND