I agree with the comments above and normally I would hate overworked photos but this has a lot of potential. It has a lot of the quality of the old airbrushed photos from that era.
I would stick at it or have another go paying attention to the tyres and masking as Donald says. I think the reflections are the easy bit and again the shot is worth the time.
If you are using PhotoShop, the pen tool is your friend for geometric things, create as few anchore points as possible, time taken getting the mask just right is time saved. don't forget to soften the edges of the mask a little. try blurring the mask (in the alpha channel or quick mask) before using it in earnest.
(edit) BTW, you apear to know your way round photo editing software, so no lecture intended

it's a cracking shot and worth the effort.