Decent chop, but there are some misstakes. The tyres are way to yellow, so they don't blend that well with the bg. The car is sitting really good in the bg, but the colors don't quite match between the bg and the car. Might need some more contrast I think. So do the tyres, then need to be matched better to the shadows and such in the paint. The wing is way to bright as well.
Like the cleaning stuff you've done thoug

The front looks a lot cooler even though you havn't really done anything special to it. So it's a good start, but it needs more work
Cheers!