If the bumper can be partially painted, the bumper painting process is as follows: Step 1: Cover the adjacent parts and clean the parts that need to be repaired with silicon solvent. Step 2: Apply putty to the whole surface and repair all scratches. Step 3: Wet and polish the whole surface with 600# sandpaper and repaint the whole surface. Step 4: Apply the two-component mixed acrylic polyurethane coating on the top coat again, and add the softener. When spraying metallic paint, please dry it quickly for 5 minutes after spraying, and then spray a layer of bright paint. Bumper repair painting process and time: 1, required tools: water sandpaper, sponge, repair artifact repair mud, scraper, coating agent, universal adhesive tape, inspection process: after getting off the bus to detect the specific position, implement the repair plan, such as: what kind of sandpaper to choose, the degree of polishing, and the uniformity of coating agent. 2. Cleaning process: the following operations are required to clean the damaged wound, and in order to show that the repair is free of impurities, you can 3. Polishing process: Please use No.320 water sandpaper for the first time until the scratches are smooth. The time required for this process is limited by the degree of damage and also related to the grinding method; Next removal: this removal is also to remove impurities in grinding, so as to better carry out the next operation. Mud filling process: fill the medicine in the area where the polished surface appears during grinding, and smear it evenly. It must not be too thick, but it must not exceed the position of the wound. This is because this process is also to flatten the concave surface and wait for more than 2 hours to dry the mud; 4. Continue to brush: This time, 600 # water sandpaper was used, but the front was smeared with mud and the buttocks were damaged. Please wipe it clean until the wound is smoothed by paint from other cars. Otherwise, the coating effect will be reduced. The time required for this process is not about 10 minutes, and it will be removed again. This cleaning is also to remove the impurities left in the previous step, so it is easy to clean and wait for drying this time. 5. Use of adhesive tape: to prepare for the next painting, and also to prevent the paint of other vehicles from being polluted. Painting process: it will be completed before this project. When bumper touch-up paint is used, the sprayed automobile paint surface must be uniform. It is best to have no chromatic aberration. Finally, you can wait for the paint to dry before polishing it with wax.