So, heres my few words about my way

:
- some ask if it is HDR - it is not
- some ask if it is few pictures connected together and mask work - it is not
- some ask if it needs good light - yes it needs... im lasy, bad ligtning meens more work, also its easy to get "halos" effect around edges... so it is about lightning (U can chceck shadows under the car, u will understand what i mean)
- some says, it needs a lot of time in
PS to get this effect - some yes, a lot no. Its more about preparing picture in the beginning, then to get the final look.
So, if U are a good photographer and can get good photo, with quite good lightning (2 Canon EX'es + 1 or 2 blends is enought if u know how use the light), then the rest is quite easy. Maybe today i will show u version with bad lightning to show what im writing about

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