Well , there are a lot of differing opinions on the subject of patina. I’ll tell you what I think is not patina: plain old thick scaly rust.
In the photo , the hood finish has worn down exposing the primer and even some bare steel. While the worn finish is not consistent , I would say that there are areas of true patina exhibited.
The Chevrolet emblem on the front of the hood on the other hand , is just plain rusted.