clear coat flaking off roof edge panels

The clear coat that is peeling can be scraped off and then you can feather the edges with fine wet/dry sandpaper to blend everything smooth. The problem is that you don't know when or if the rest of it will start peeling in a week, month, or never. Once the loose clear is removed, you can try using a polishing(not rubbing) compound followed by a good wax. This may bring back some of the gloss to the surface.