I had similar marks near the ZL1 badge but on the paint. It appeared as though something had laid on the hood, bird bomb, hard water, something at the factory. It looked like there was a cloudy spot in the paint.
A quick buff with Adams Fine Machine Polish is all it took to remove it. Don't use anything harsh, a finishing polish is all that it will take to remove it and you can go ahead and do the entire hood while your at it.
Then throw on a good sealant of your choice and no more worries
