Using these ABW fender flares on your Subaru WRX or STI is easy. First, make sure your car is clean and dry. Take your time to prep the flares for fitting, making any necessary adjustments. When you're ready, carefully attach them to your car. As for painting, choose a paint that matches your car's color. After installation, drive your car as normal. But keep in mind, these flares are made to order, so you'll have to wait two weeks for them to be shipped. To maintain them, wash them regularly with a mild car cleaner. Avoid using harsh chemicals that could damage the white gelcoat finish. If you notice any chips or scratches, touch them up with paint as soon as possible to prevent further damage.