A typical base coat/clear coat system requires you to recoat with more base within a certain time period, sometimes as much as 6 to 8 hours. After all the base color is applied the stripes are layed out with 3M fine line tape. All the rest of the car is masked off with paper and the color stripes are painted on. The clear has to also be applied within a certain time window. All the masking paper and tape is removed, the car is tack ragged. Any imperfections are repaired at this point. Then multiple coats of clear are then layed on. After a sufficient drying period the clear is color sanded and buffed. If it is done correctly you cannot feel the lines between color change.