Using these fender flares is easy. First, check that the flares match your 2006 - 2007 Subaru WRX or STI Sedan. You'll need to do some prepping work like sanding and cleaning the areas where the flares will be installed. Then, fit the flares in place and make any necessary adjustments for a perfect fit. After that, you can paint them to match your car's color. When it comes to maintenance, keep them clean with regular car washes. Avoid using harsh chemicals that could damage the fiberglass or the white gelcoat finish. Remember, these flares are made to order, so it will take 2 weeks to ship after you place your order.