Update.
OK, I know this sounds crazy, but we have had rain for the first time in forever the last 2 days. I had noticed that the more my wipers went, the less that spot on my windshield showed up. Yesterday by the time I got home, it was nearly gone! I called my brother and asked him if he had ever heard of a self healing windshield. He said I probably just have a rough spot and it was filled with chalk from the rock. The wipers had probably washed the chalk out of the rough place.
You can still see a small imperfection, but it isn't in the line of vison for me or my occational passenger. I'm going to leave it alone.
Now if the place on the hood would heal itself.
