Hmmm, I dont think I will be using a power washer because I am concerned about blowing the Smart apart while washing it.

But I will use the old hose and sponge method since I dont think it will fit in the car wash. Oh yeah I use the ones with the cloth washing strips all of the time on all of my cars including Vette. When you get down to it, it is just a car ** a depreciating item that gets you where you want to go, not an investment. Thats what I try to keep telling myself. Besides the clear coat finish on the new cars today are really strong. I think its more important to keep the car in a garage.
Now my Bugatti Vernon and Ferrari 430 on the other hand ... don't I wish.