The Ultimate Guide to Cleaning and Maintaining Your Aero Kit

An aftermarket aero kit transforms the look and performance of your car, adding aggressive styling and functional downforce. But without proper care, those front lips, side skirts, rear diffusers, and splitters can quickly show wear from road debris, UV rays, and harsh chemicals. Whether you drive a Subaru WRX, Honda Civic, or Toyota GR86, keeping your aero components clean and protected is essential for long-lasting appearance and performance.

In this guide, we'll walk you through the best practices for cleaning and maintaining your aero kit, covering different materials like carbon fiber, polyurethane, and ABS plastic. You'll learn how often to clean, what products to use, and how to avoid common mistakes that can damage your investment. Plus, we'll highlight specific products from the AFD Aero Kits lineup that can help you keep your car looking fresh.

Why Aero Kit Maintenance Matters

Your aero kit isn't just for show—it's designed to manage airflow, reduce lift, and improve stability at speed. Over time, dirt, bug splatter, tar, and road salt can build up on the surfaces, especially on low-mounted components like front splitters and side skirts. This buildup not only looks bad but can also degrade the material's finish and even affect aerodynamics.

For carbon fiber parts, UV exposure can cause yellowing or fading if not properly protected. Painted aero pieces can chip or scratch from gravel. Polyurethane components, while flexible, can become brittle if exposed to harsh cleaners. Regular cleaning and protection extend the life of your kit and maintain that just-installed look.

• Prevents dirt and grime from etching into the surface
• Protects against UV damage and fading
• Reduces the risk of stone chips and scratches
• Maintains the resale value of your aftermarket parts

Materials Matter: Know What You're Dealing With

Before you start cleaning, identify the material of your aero kit. Most aftermarket aero parts fall into three categories: carbon fiber, polyurethane, and ABS plastic. Each requires a slightly different approach. Carbon fiber is lightweight and strong but can be sensitive to abrasive cleaners. Polyurethane is flexible and impact-resistant but can react poorly to solvents. ABS plastic is durable but can scratch easily.

For example, the 2023 - 2026 Honda Civic Type-R Rear Bumper Extension is made from high-quality materials that benefit from gentle washing and occasional waxing. Similarly, the 2022+ Hyundai Elantra N V1 Diffuser is designed for durability but still needs routine care to prevent fading. Always check the manufacturer's recommendations for your specific part.

• Carbon fiber: use pH-neutral soap, avoid ammonia-based cleaners
• Polyurethane: clean with mild soap, avoid petroleum-based products
• ABS plastic: use a soft microfiber cloth, avoid harsh brushes

Step-by-Step Aero Kit Cleaning Routine

Start by rinsing the entire car and aero kit with water to remove loose dirt. Use a two-bucket wash method—one for soapy water, one for rinsing your mitt—to avoid scratching. For low-mounted parts like front lips and side skirts, pay extra attention to the underside where grime collects. A soft-bristled brush can help dislodge stubborn dirt without damaging the finish.

After washing, dry the aero components with a clean microfiber towel. Avoid letting them air dry, as water spots can leave mineral deposits. For carbon fiber parts, consider using a dedicated carbon fiber cleaner and sealant to restore gloss and add UV protection. For painted parts, a quick detailer or spray wax can add a layer of protection between full washes.

• Rinse thoroughly before washing to remove loose grit
• Use separate mitts for wheels and body to avoid cross-contamination
• Dry immediately with a soft microfiber towel
• Apply a protectant or sealant every 2-3 months

Common Mistakes to Avoid

One of the biggest mistakes is using automatic car washes with harsh brushes that can scratch or chip your aero kit. Another is applying wax or sealant without first cleaning the surface thoroughly—this can trap dirt and cause swirl marks. Avoid using degreasers or all-purpose cleaners on carbon fiber, as they can strip protective coatings.

Also, be mindful of heat. Exhaust components like the 2015-2021 Subaru WRX/STI AFD F1 Valved Catback Exhaust get very hot, so avoid cleaning them immediately after driving. For wheel spacers and other hardware, keep them clean and dry to prevent corrosion. Regular inspection of mounting points and fasteners is also important to ensure everything stays tight and secure.

• Never use automatic car washes with brushes
• Don't apply wax over dirt or grime
• Avoid harsh chemicals on carbon fiber
• Let hot parts cool before cleaning

Seasonal Care and Storage Tips

If you live in an area with harsh winters, road salt and sand can be particularly damaging to aero kits. Consider applying a ceramic coating or paint protection film to vulnerable areas like the front splitter and side skirts. This creates a sacrificial layer that takes the brunt of debris and makes cleaning easier.

During summer, UV exposure is the main concern. Park in the shade when possible, and use a UV protectant specifically designed for automotive plastics and carbon fiber. If you store your car for extended periods, keep it in a garage or use a breathable car cover to prevent dust buildup. Checking the fitment of your aero parts periodically ensures they haven't loosened over time.

• Apply ceramic coating for long-term protection
• Use UV protectant on exposed parts
• Store in a garage or under a cover when not in use
• Check fasteners and mounting points regularly

Taking care of your aero kit doesn't have to be complicated, but it does require the right techniques and products. By following the steps above, you can keep your front lips, side skirts, rear diffusers, and splitters looking like new for years. If you're looking to upgrade or replace a component, check out the 2022+ Toyota GR86 TRD V2 Splitter for a sleek addition that matches your maintenance routine. Explore the full range of aero parts at AFD Aero Kits to find the perfect fit for your build.