Here are two tests you can perform to assess the state of the paint:After washing and drying the car, lightly rub your palm along the upper surfaces. The surfaces should have a very smooth feel to them. If you see rough areas or drag, the automobile needs to be waxed.Spritz the automobile with water. If tight beads appear, this indicates that the paint has been properly protected. If the beads are loose, the automobile does not have enough protection; if there are no beads, the car does not have any protection, and wax should be applied immediately.