If the MF screwed up the paint, it was because the washer didn't use them correctly. MF will hold on to grime well, and if they are not properly rinsed often they will rip clear coat to pieces. Again, they must be used using the 2-bucket method.
http://www.autopia.org/forums/the-d...e-com/37334-wash-car-using-bucket-method.html
I will rinse, low power pressure wash, foam cannon, 2 bucket wash with multiple micro fiber rags, low pressure rinse, and then shammy dry with an Absorber. Works very well, and leaves no scratches. When using the MF, fold into 4ths, and it gives to 8 clean surfaces per rag.