Now, it may seem crazy that anyone would take sandpaper to a new paint job, but if you want to have a glass-like finish that is exactly what happens. Of course, it is special sandpaper, and the person doing the work needs to know exactly what he is doing or that paint job can be toast. One of the things that makes color sanding possible is that the paper used is meant to be wet while the job is taking place. The water not only works as a lubricant, but it also removes the fine paint sludge from the area. The problem is getting that water in the proper place and having enough of it to do the job. After all, who really likes sticking his arm into a cold bucket of water time after time?