So it doesn't sound like you had any issues with the UDM, just nature.
The car getting "dirty" right before your eyes is the nature of the beast. Try working on a black car. On a typical weekend of washing, I wash my car, then my wifes, then I go over my finish with S&W or a quick detailer, after which I apply my LSP booster. After that I go over the finish of my wifes car with S&W or a QD, then apply LSP booster. If I delay even five minutes after washing, I feel I have to go over the finish with a QD. All that hard work we put into polishing, then to have a grain of something scratch your finish. It's just wrong on so many levels.
So what I'm saying is, Your Not Alone
