Your vehicle is subjected to all types of airborne contaminants. If you are using an organic wax or drive or park your vehicle outside at least 30% of the time, the surface needs to be cleaned before applying was or polish. We recommend FINISH PREP for this because it gently removes water spots, tar, bugs, old wax, scratches, swirls and oxidation using synthetic emulsifiers that clean by dissolving, instead of organic and harsh abrasives that can scratch your delicate paint or clearcoat surface. It is impossible to create a durable deep gloss finish by applying wax or polish on top of contamination and oxidation. Using this product is so easy – just wipe onto a small area, then take another towel and wipe off while wet. It is that simple to clean your painted surfaces and not create scratches or swirl marks!