The lack of paint around rear hatch hinges is a common problem. It has been discussed online before (here?) and I noticed the same issue on every '07 Escape I inspected, both hybrid and conventional. I live near the coast and haven't detected any rust yet. It seems the hinge area got the metal coating and/or primer, just not final color.

When I picked up my '07 FEH, the driver rear door had several raised splotches about the size of a fingerprint right in the middle of the door. These were underneath the factory paint in my opinion, and the dealership agreed. I noticed the defect a few minutes after signing all the papers and had them switch doors with another dune pearl escape on the lot.