I just clayed and waxed my 2009 Nissan Versa Hatchback. I was looking at the roof when I noticed a brown spot that looked like rust. Well I started going over it with the clay and cleaner and it didn't come off. So it is a rust spot but how is that possible with this new of a car? It's looks like a paint chip where rust has started. So now what do I do? I don't want to mess up my car fixing it and I really don't want to go to a bodyshop. Would it just be surface rust as I thought newer cars weren't supposed to rust?