I walk the dog every morning and really like the color of this guy's car who parks in my neighborhood and takes the metro to work in San Francisco (not so much the car but the color is great). I finally ran into him and we had a nice chat about the car, the color etc.... We bumped elbows and we went our separate ways. Now I see his car parked here every weekday. Today it was dirty. I just finished washing and waxing my car and it looks great. I wondered.... what if i washed and waxed his car while he was at work and he came back and saw this. Would he be pleased? Pissed? is it a bad idea? What do you think?