You can apply wax first to see if it looks light. If the scratches are not big, you can touch them up. The corners of the bumper can be repainted. They need to be polished to achieve the effect. If it is the middle part of the rear bumper, it is recommended to polish it. The cost of spraying, spotting (generally free) and spray painting (around 300, depending on the market and model) are different, depending on your requirements.
Car spray painting refers to applying a layer of paint to the surface of the car to protect the car. Automobile spray painting generally uses baking paint. In the automobile manufacturing plant, the frame and shell are welded, and the next process is painting. The forms include ordinary paint, metallic paint, and pearlescent paint. Automobile painting process: puttying, sanding, painting, etc.
Car spray paint includes: ordinary paint; metallic paint; pearlescent paint; varnish; matte paint.