Rain after waxing has no effect on the car. Rain will not wash away the freshly applied wax because the wax itself is waterproof and protects the car's paint. Typically, the wax will naturally evaporate under sunlight within 1 to 2 weeks. The functions of car wax include: Waterproofing: Under intense sunlight, each tiny water droplet acts like a convex lens. At its focal point, temperatures can reach 800–1000 degrees, causing dark spots on the paint and significantly affecting the quality and lifespan of the paint. It can also lead to rust on exposed metal surfaces. Car wax repels water-based substances, making it harder for water droplets to adhere to the car's surface. Heat Resistance: Car wax reflects incoming light from various directions, preventing reflected light from aging and discoloring the paint and base coat. Anti-Static Properties: Static electricity can cause many inconveniences for drivers and even harm them. Car wax's anti-static function mainly prevents static on the car's surface by blocking friction between dust and metal surfaces. The effectiveness varies depending on the thickness of the wax layer and the wax's adhesion. Generally, anti-static wax is better at preventing dust-paint friction than regular wax. UV Protection: Due to the nature of UV rays, they can easily refract into the paint. UV-protective car wax takes this into account, minimizing damage to the car's surface. Polishing Effect: Polishing is the most basic function of car wax. A waxed car will have improved surface brightness, restoring its original shine. Things to note when waxing: Before waxing, wash the car with car shampoo to remove dirt and dust. Avoid using dish soap or soapy water, as the sodium chloride content can erode the paint, wax film, and rubber parts, causing the paint to lose its shine and rubber parts to age. If no car shampoo is available, use clean water to wash the car and dry it before waxing. Control the frequency of waxing. Depending on the driving and parking environment, the interval between waxing sessions should vary. Generally, cars parked in garages and driven on good roads should be waxed every 3-4 months. Cars parked outdoors, exposed to wind and rain, should be waxed every 2-3 months. This is not a strict rule—wax when the car's surface feels rough to the touch. Avoid waxing new cars unnecessarily. Some people wax their new cars immediately after purchase, which is not advisable. New cars already have a protective wax layer, and premature waxing can remove this original layer, leading to unnecessary waste. Generally, new cars don’t need waxing within the first five months. After waxing, residue may remain in gaps like headlights, license plates, doors, and trunks, making the car look unsightly. If not cleaned promptly, this residue can cause rust. Therefore, ensure all wax residue is thoroughly removed after waxing for the best results. When applying wax, use a sponge to apply an appropriate amount in straight, back-and-forth motions. Do not pour wax onto the car or apply it in circular motions. Complete the application in one go without stopping. Typically, after spreading the wax evenly, wait 5-10 minutes before polishing with a new towel. Quick waxes should be polished immediately while applying. Wax the car in a shaded area to prevent the body from heating up. High temperatures reduce wax adhesion, affecting the quality of the wax job.
