After a blowout tore up my wheel well (years ago), I used galvanized sheet metal and "pop rivets" to fix the damage. Wear heavy gloves -- those edges are sharp. Don't ask how I learned this tip.
I then "up armored" the new wheel well with mud flap rubber -- very inexpensive. Buy it at a truck supply store. I cut it to shape and used Gorilla Glue to fasten it in place.
Since I have had no blowouts in many years, I don't know if the rubber armor would have worked to prevent damage. But it made me feel better.
Here is a link to my blog entry on the armor project: