Your '57 is looking great! I have a real soft spot for these cars, especially since I have one in the garage.
A little hint to this kit/build: If you sand and get the top of the fender smooth and then use a piece of half round for the ridge you will be much happier with the end result. Another point of concern I have corrected is the area right in front of the rear tire, it needs to fade away from top to bottom.
And do not be afraid to glue the front valance to the lower front fender, that is attached on a 1:1. Argent silver is factory correct for the valance also.
All merely FYI's