That is awesome!
As an Australian living in the US, this is really cool. If I do buy a Sonic, I would like to do this. I also contemplated what to do with the front grille, since the cross-bar does have those insets for the Chevy bowtie. Your solution with the license plate was an easy one, and looks quite good. When you first explained that you were bumping up the plate a few inches, it sounded tacky. But the end result looks stock and like the license plate belonged there the whole time. Well done!
Are you going to put the "Barina" badge on the trunk (boot) as well?
I did this same thing to my Aveo about 10 years and it was fun seeing people's reactions. They either didn't know what it was, or thought it was imported.
Yeap, I would do this to my Sonic if I get one for sure!