I'll avoid taking a stance on the aesthetic qualities of the TT - the shape is not bad tho - I worked for 6 months in the Ingolstadt Audi factory ont he assembly line so I should have developed a fairly good eye

The fenders will take a fair bit of work to get the tangency right. Have you checked out the suburu nurbs car tutorial? I definitively reccomend it.

https://www.blissdd.com/WRX/Tutorial/tutorial.html