Michelle "Bombshell" McGee -- alleged mistress and all around classy chick -- is now driving a Maserati ... and the company that made the deal with her actually thinks she's a good spokes-mistress.



In what has to be one of the oddest marketing campaigns ever ... a San Diego exotic car dealer actually wants Jesse James' AM#1 to be photographed driving their car.

We're told McGee traded her BMW for the slightly used Maserati ... a sweet deal for her. As for the exotic car company ... we're wondering how many people who fit Bombshell's profile are really in the market?