I hate to tell you this but that's "Diecast Cancer" on the hood. Some diecast cars do this due to contaminated metal used when they are cast. They just continue to get worse and crumble away. This Camaro is one prone to this. The Ertl 1/18 Copo and ZL-1 Camaros all really seem to be affected. Most of the other Camaros from Ertl don't seem to be affected but it can take several years to show up. You can go here, do a search for "Diecast Cancer" you'll find lots of info and complaining. I know because I have a few.
http://www.diecast-pub.com/forums2/i...hp?showforum=4