
The difference between paint jobs at 4S stores and outside shops lies in the fact that technicians at 4S stores are more professional, the paint quality used is superior, and the paint booths at 4S stores are more advanced, with better working environments. Here are some precautions to take after a car paint job: 1. After painting, be cautious when washing the car. Avoid using anything other than soft water, including hot water, alkaline water, or water with high hardness, as these can damage the paint. If hard water is used to wash the car, it may leave marks on the paint surface after drying, affecting the appearance. 2. Do not expose the car to direct sunlight or wash it immediately after the engine cools down, as this can impact the paint surface and shorten its lifespan. 3. Avoid using high-pressure water streams to wash the car body. If there is stubborn dirt, first soak it with water and then rinse gently. Use a dispersed water stream for washing, as excessive water pressure can damage the paint. 4. Do not randomly use cleaning agents. For tough stains, choose appropriate cleaning agents. For oil stains, use a sponge lightly dipped in kerosene or gasoline to wipe gently, then apply polishing paste to restore shine. For biological residues like dead insects, first soak with soapy water, then clean with a damp sponge.

Last time I repaired my car door, I specifically compared the differences in painting between the two options. The price at the 4S shop was indeed much higher, with the same area costing more than double. However, 4S shops use genuine manufacturer paint, and their color matching is more precise. For a white car like mine, the color difference is barely noticeable. Their painting booths are dust-free environments, and even the temperature control in the baking room is more professional than outside shops. Most importantly, the after-sales service is guaranteed—minor scratches get free touch-ups, and any bubbling or peeling within three years is redone at no cost. Quick repair shops outside are cheaper, but my neighbor had his car painted at a roadside shop, and within six months, the paint showed cracks. They said it was because they skipped the primer step. In my opinion, for new cars or visible areas, going to a 4S shop is more reliable.

I had my car fully repainted last month at an external chain shop, saving 4,000 yuan compared to the 4S dealership quote. The owner was quite honest, saying they use imported water-based paint with environmental standards not inferior to OEM. They meticulously removed door handles, lights, etc., before painting—unlike some small shops that just tape newspapers carelessly. However, color matching was a bit frustrating; metallic paint shows subtle variations under different lighting. They offer a two-year warranty, but you must keep the payment receipt. Efficiency was impressive—ready in three days, whereas 4S shops often make you wait a week in line. Ideal for budget-conscious older cars; mine’s eight years old, so I wasn’t chasing perfection anyway.

My friend who just bought a used car always asks me where to go for painting, and I say it depends on the situation. The 4S shop has standardized processes, three quality control checkpoints, and uses manufacturer-specific baking lights. The skill level of outside technicians varies greatly—I've seen apprentices directly sanding the original paint with sandpaper. However, large-brand sheet metal and paint centers are also good now, with high-precision computer color matching machines. The key is to consider the repair area: small scratches can be handled with a touch-up pen outside, but for large areas, it's better to spend more money. Also, pay attention to the maintenance records, as work done at a 4S shop will be logged in the car manufacturer's system and affect the resale value.

The veteran mechanic at the repair shop told me that the difference in painting mainly lies in the process details. Dealerships strictly follow a six-layer process: rust removal, epoxy primer, mid-coat, base coat, clear coat, and polishing, with standardized working hours for each step. Quick repair shops often skip the plastic filler step, which can lead to water seepage and bubbling in rainy weather. In terms of equipment, dealerships use high-power baking lamps, resulting in harder paint surfaces. However, if independent shops use Dupont paint and apply three patient layers of clear coat, the scratch resistance can be comparable. It's recommended to schedule paint repairs during dry seasons, as poor humidity control can cause fogging on the paint surface.

I compared the paint jobs from both sides, and the most noticeable difference is the texture. The paint done by the 4S shop feels as smooth as glass with even thickness. The one done outside occasionally shows orange peel texture when examined closely under sunlight, likely due to skipped polishing steps. In terms of weather resistance, after parking in the community underground garage for three years, the rear bumper painted by the 4S shop hasn't yellowed, while the hood done by a street shop has started to fade. For high-end cars with pearl paint, it's safer to go to the 4S shop as they have a more complete color formula inventory. However, for touch-ups on plastic parts like side mirrors, a reliable small shop is actually sufficient.


