uhh....I think this is a bad idea. There is no doubt that prolonged heat exposure is bad for the car, but won't this cause thermal stressing for the paint? I dont know how many of you have steam cleaned something, but have you noticed that it never comes 100% clean? Imagine that with dirt...except it is being scraped against your paint. In my head it doesn't make a ton of sense. I mean if water could offer enough lubrication to remove dirt why do we use QD...why not just water on a dirty car? I think that steam will never provide ample lubrication. Maybe at a high enough pressure it might be able to blast off dirt, but I would be concerned about the paint and how safe it is.