When parking, I used to just stay in my car and try to duck when my colleagues is walking in or out of the building. I gave up now since everyone knows my car.
I used to tell people that my father-in-law bought the car for my wife and I as a wedding gift.

However, this will be my last nice car that I will ever drive to work; my next car will be a weekend only car.

I think it is just better to avoid the headache in the first place even though quite a few of my colleagues have boats that cost about a $1k to fill-up.