I did answer it.
Use an ice blaster.
Not water just frozen co2 that vaporizes when it hits the car.
Come on guys, don`t tell me that you don`t have that in the US.
Here are some bevore-after pictures
Ice blasting Ice blasting 2 This is not like sand/media blasting. It only removes the dirt/mud/crude/oily-ugly-stuff. It don´t touches the paint. You can leave all the cables and hoses and all in without hurting anything
Frank
