I dont have a before and after engine bay but I do have a full inside detail I performed of a recent trade in at the dealership I work at.
how can anyone let their car get that filthy? Also how can anyone trade that in? I'd be embarrassed. When I used to smoke I would smoke in my old mazda 3 and it would look like it snowed in there Then the ashes would get ground into the uphostery and look terrible. It drove me crazy enough to stop smoking in there and then quit eventually. Not because of me, but because of my car. sad, I know.