First decent photoshop effort.

One of the many photos on my hdd, decided to have a bit of a go - so here goes any comments and critique is welcome, I was rough on some edges - for example inside the windows.

Colour, background have been edited and I gave the engine a shine, might be too much however - anybody else think so?
Note: it's my very first time editing the rims on a car, any feedback there would be great, I think I handled that one spot on though.

First shot is unedited and after is the edit (obvious though) and it was shot in JPEG. Thanks!!

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I like it, although it needs a connection with the ground so that it does not look like it was flying, maybe a blurred road going past, great photoshop work on the car.

I think you did a good job, except for the tires. Since they blended in with the shadow in the original shot, it was difficult to isolate them. However, I think you cut off too much. A car with an engine like that suggests that it should be wearing wide racing tires. Yet they look like something you'd see on a Yaris.

I like the look of it being in mid air. It would be even more effective if you added a shadow on the ground -- just a touch in the bottom right corner. Also, next time, put somebody in the driver's seat so it doesn't look like the car is driving itself.