being as how the one trying to round up work hasnt replied..

wet sanding is basically a technique where the person working on the car uses ultra fine sandpaper and water to sand the clear coat on the car, removing any bump scratchs or inperfections. the water is effectively a friction modifier that allows for a smoother finish a better finish. after wet sanding the clear coat is slightly milky because of all the fine scratches and has to be buffed/polished out. after a proper buff job the paint will look like its brand new assuming there is enough clear to work with.