For metal sheet areas, you can purchase a touch-up paint pen to apply color, which helps prevent rust from spreading and worsening. If the damage is on the front or rear bumper, you can leave it as is. If you notice the issue when picking up the car, you can negotiate with the 4S dealership for a solution. Below is relevant information: 1. Automotive paint generally consists of four basic components: film-forming substances (resins), pigments (including extender pigments), solvents, and additives. 2. The film-forming substance is the main component of paint, serving to keep the pigment bright, durable, and firmly adhered to the surface. It determines the type of paint. Typically, it is made from natural resins (such as rosin) modified with drying or semi-drying oils, synthetic resins (such as maleic resin), or polymer resins (such as methyl methacrylate, polyurethane, polystyrene, polyvinyl chloride, etc.). 3. Durability, adhesion, corrosion resistance, abrasion resistance, and toughness are usually adjusted and improved by adding plasticizers and catalysts. Pigments are one of the two non-volatile substances in paint, providing color and durability while giving the paint opacity, enhancing strength and adhesion, altering gloss, and improving flow and application properties. 4. Solvents are the volatile components in paint, primarily serving to fully dissolve the resin in the paint film, enabling proper application. Additives include curing agents that speed up drying and enhance gloss, retarders that slow drying, and matting agents that reduce shine. Some additives serve multiple purposes, such as reducing wrinkles, accelerating drying, preventing whitening, and improving resistance to chemicals.
