Using this product is a breeze. First, carefully remove the factory low-profile spoiler from your 2015 - 2021 WRX or STI. Once the spoiler is off, you'll see the holes. Take the paint-matched strip that comes with the kit and align it with the holes. Then, simply install it using the included installation materials. It's really easy and doesn't require any special skills. As for maintenance, just keep it clean. You can wash it with regular car - washing soap and water. Avoid using abrasive cleaners as they might damage the paint. If you notice any loose parts during use, make sure to check the installation and tighten them up as needed. This will help keep your trunk looking great and the product in good condition for a long time.