Priya Kapoor
Large paint chips on your car's bumper can be an unsightly issue, but it is possible to fix them yourself. Firstly, assess the size, depth and number of chips, as this will determine the best method for repair. If the chips are large and exposing the bare metal of your car, you will need to sand, prime and apply multiple layers of paint. To begin, clean the area with soap and water and dry with a soft microfiber towel. Next, sand down the area with fine-grit sandpaper, using the 'wet sanding' technique. Once dry, apply primer to the affected area, ensuring you only cover the unpainted area with a thin coat. When the primer is dry, apply the touch-up paint with an applicator brush, allowing the paint to settle evenly. Finally, apply 2-3 coats of an acrylic clear coat and leave to dry overnight.
| Characteristics | Values |
|---|---|
| When to fix | As soon as possible, before the exposed metal begins to rust |
| Tools | Touch-up paint, automotive primer, applicator brush, sandpaper, polishing compound, car wax, microfiber towel, soap, water |
| Preparation | Wash and dry the area to be fixed |
| Primer | Apply a thin coat of primer to the exposed metal, ensuring not to get primer on the surrounding paint |
| Paint | Apply a small amount of paint over the primer coat, allowing it to settle instead of stroking it on |
| Multiple coats | Apply 2-3 coats of an Acrylic Clear, allowing each coat to dry for at least four hours |
| Waxing | Wash and wax the entire vehicle to ensure the glossiness of the paint matches throughout |
| Sanding | Use fine-grit sandpaper to delicately rough up the surface for better integration with the touch-up paint |
| Buffing | Use an electric buffer with hand applicator pads to give a restored look to the vehicle |
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What You'll Learn
Sand the chipped area
Large paint chips on your car require a more complex repair process than small chips, often involving sanding, priming, and applying multiple layers of paint. Before you begin, it is important to assess the size and depth of the chip. If the chip has penetrated to the bare metal, you must apply primer to create a suitable base for the paint.
When sanding the chipped area, always use fine-grit sandpaper (1500 or 2000 grit) to delicately roughen the surface and flatten it out for better integration with the touch-up paint. Remember to soak your sandpaper in water before sanding, a technique known as "wet sanding". Focus your efforts on the chipped area, using the narrower end of a sanding block to minimise the impact on the surrounding paint.
Once the repair area is dry, apply a second round of wet sanding with 1000-grit sandpaper. Repeat this process with patience and care until you achieve your desired finish. An electric buffer can be used to achieve a professional-looking finish, along with hand applicator pads and pads designed for wax and rubbing compound.
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Clean the bumper
To touch up large paint chips on your bumper, you'll first need to clean the bumper thoroughly. This step is crucial as it ensures a flawless paint job and minimises potential corrosion. Here's a detailed guide on how to clean your bumper before touching up the paint:
Rinse with Water:
Start by giving your bumper a thorough rinse with clean water. This initial step helps remove loose dirt and grime from the surface. While it may seem basic, a simple water rinse is an effective way to begin the cleaning process without causing any damage to the existing paintwork.
Use a Suitable Car Wash Soap:
After rinsing, it's time to wash the bumper with a high-quality car wash soap and water solution. Avoid using household detergents or dish soap, as they can be too harsh and potentially damage your car's paint. Opt for a specialised car wash soap that will effectively remove contaminants without stripping away the protective lacquer.
Apply a Degreaser or Cleaner Polish:
Once the bumper is washed and rinsed, it's important to use a degreaser or cleaner polish specifically designed for car paint. This step will help remove any remaining wax, grease, or oil residue from the surface. These contaminants can interfere with the adhesion of the new paint, so it's crucial to ensure they are thoroughly eliminated.
Use Detailing Clay for Persistent Contaminants:
For any entrenched or persistent contaminants that weren't removed by the degreaser, you can use detailing clay. This product is designed to tackle micro-contaminants that may settle even after the initial cleaning steps. Detailing clay ensures that the bumper surface is completely free of impurities before you begin the touch-up process.
Wipe Down with a Clean Cloth:
After the cleaning process, wipe the bumper thoroughly with a soft, clean cloth. Make sure to dry it completely before proceeding to the next step. This ensures that no water residue is left behind, which could interfere with the paint application.
Mask Off Surrounding Areas (Optional):
If you're concerned about overspray or accidental paint application, you can use painter's tape to mask off the areas surrounding the paint chips. This step is optional but can provide added protection for the rest of your car's finish.
Remember, taking your time with the cleaning process will ensure the best results for your touch-up paint job. A clean and properly prepared surface is key to achieving a durable and flawless finish.
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Prime the bumper
To prime the bumper, you must first clean the surface. Use a wax and grease remover to ensure the surface is free of any dirt or waxy buildup, as this will prevent the paint from adhering properly. Once the bumper is clean and dry, you can begin the priming process.
If you are using a plastic bumper, it is recommended to use a plastic primer or a plastic prep agent. This will help the paint adhere to the surface and prevent chipping and flexing. Apply the first coat of primer lightly, and wait about 20 minutes before applying the second coat. Make sure to follow the instructions on the product and allow adequate time for the primer to dry.
If your bumper has shallow scratches or cracks, you may need to fill and sand the damaged areas before priming. Use 320-grit sandpaper to remove the top coat of paint and 600-grit sandpaper to finish. Wet sand the bumper in alternating directions to achieve a smooth, flawless finish. Remove any dust or residue with a soft cloth.
Once the bumper is smooth and clean, you can apply the primer. Follow the instructions on the product and apply the primer in thin, even coats. Make sure to cover the entire surface and allow enough time for the primer to dry before proceeding to the next step.
After priming, you may need to sand the surface again to smooth it out. Use 800-grit sandpaper and lightly sand the primed surface. Remove any dust with a soft cloth before proceeding to the painting stage. Remember to always wear protective gear, such as gloves and a respirator, when working with primers and paints.
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Match the paint
Matching the paint is the most important step in touching up large paint chips on your bumper. All vehicle paint is colour-coded, and touch-up paint products are marked to simplify the matching process. The first step is to find out the colour code for your car paint. This code is located in several places, including the purchase documentation, the driver's side door jamb, and under the hood. You can also find the exterior paint colour indicated on the vehicle identification tag, the location of which varies by model year and manufacturer.
Once you have the paint code, you can use a paint finder to get paint that exactly matches your car. TouchUpDirect offers auto touch-up paint in paint pen, brush, and aerosol forms, and can help you find the right colour to match your car. You can also contact your local dealership for help locating your paint code. If you had your car repainted, the paint shop should have provided you with the colour code or formula.
If you are not the original owner of the car and are unsure if it has been repainted, you can try to match the paint by taking a picture of a clean, well-painted area of the car. Take the photo in natural light, with as little glare as possible, and provide this to a custom paint mixer. They can use a spectrophotometer colour-matching device to analyse the colour and break it down into a mixable paint formula. You can also provide a paint sample to get an accurate formula for your paint.
It is important to note that even with modern technology, a 100% perfect match may not be achievable, especially for older vehicles or those with custom paint jobs. In addition, metallic paints can be challenging to match exactly, and blending the new paint into the surrounding area is often necessary to achieve a smooth finish.
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Apply clear coat
The clear coat is the final and topmost layer of your car's paint. It is transparent and serves two primary purposes. Firstly, it gives your car a glossy look, and secondly, it acts as a protective layer to the base coat, preventing its appearance from being severely damaged by scratches, stone chips, and weathering.
After applying the touch-up paint, you can apply the clear coat. Some touch-up paint kits come with a clear coat, while others require you to purchase it separately. Before applying the clear coat, ensure that the touch-up paint is completely dry.
To apply the clear coat, use small brush strokes to create an even coat over the painted area. Allow the clear coat to dry, and then use a spray bottle to wet the surface. Gently sand the area with fine-grit sandpaper (around 3000 grit) until it feels smooth. Remove any painter's tape and dry the area with a rag. Apply rubbing compound to the painted area and rub vigorously in a circular motion to buff the surface. This process can be done by hand or with a buffing machine.
It is important to note that blending the clear coat with the existing paint can be challenging. The clear coat may not match the paint perfectly, and you may always see the edge where the new clear coat ends. However, blending agents can be added to minimize this edge. Alternatively, you can consider clearing the entire bumper or panel to ensure a seamless finish.
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