My car is still on a bumper to bumper warranty, so I took it in and a guy said that the paint isn't covered under a warranty.Had the same problem with my 06 NHBP. Went back to the dealership, they were horrified. They repainted the hood since that was the only area affected. The marks look like tiny chevrons ^ and I believe that they were the clear coat cracking. On black they really show up well.