Nice work, Laurent! ... but the first thought was that the taillights look like taillights of an Opel Astra!? especially on the second photo!
Can you take a photo from more distance, please?
The skirts... on your first photo it seems ok, but know i think that they are a little bit too agressiv. ...or do you want to make the the look of the rear bumper more agressiv so it's a better harmonie between the skirts and the bumper?!