The detail in the car really is stunning, the reflections look spot on with their smooth finish and the wheels have been cleaned up amazingly well.
I feel however that the shot itself is quite boring. It seems that it's been taken for cleaning purposes which is fair enough but I would love to see what you could do with a different composition too!
BTW, what are 'jambs'?
Also, I like what you did to the background, that sort of fading haze gives it a sense of depth. Very nice, 440. 👍