I have added a bit more to this model on and off over the past couple of days. It has started to get quite complicated as the back of the car has an open engine bay which as you can imagine is quite technical, fiddly and tedious but nevertheless is looking nice! Once the panels have been modelled I have been extruding the edges to give the feel for some depth and then bevelling the corners and the edges to make the panels line up and slot together nicely.
Some updated images:
On one of the images I have grouped it all together and duplicated to make sure that everything looks correct and I think it all looks fine. There isnt too much body work left to model now so this part should be complete fairly soon.