I love the top radiator box... it looked terrible before the bondo, but now its amazing!
However... I have to give this a F for the window! whats with the super large molding around the window cut? get some small c or u channel... it'll look much less obtrusive with the same purpose!
Also, settle on a different window shape IMO... the octagon looks horrible! Change it to a rectangle or a rounded shape.
Just my opinion though... do you have any previous work?