Using these side skirts is a breeze. First, make sure you have all the included hardware handy. Since they are already finished with a high - gloss carbon fiber look, there's no need to sand or paint them. Just find a flat and clean surface to work on. You can start installing them right away on your 2015 - 2018 Subaru WRX or STI. When attaching the optional mini emblems, carefully peel off the backing of the pre - applied 3M tape and press firmly onto the desired spot. As for maintenance, avoid using abrasive cleaners that could scratch the carbon fiber finish. A gentle car wash soap and a soft cloth are enough to keep them looking great. Also, be careful when parking or driving in tight spaces to prevent any damage to the side skirts.