I am a fan of Meguiar's products ever since I tried the Ultimate Quick Wax. I decided to try this one as well. The car was very dusty since I live in a rural area, but it didn't have any bird droppings or other stains on it. I followed the instructions I found on YouTube: I sprayed and wiped the entire car with a soft Meguiar's towel once, and I did it piece by piece, for example, first the hood, then the doors, etc. The result was perfect, but it left some "shadows". I repeated the same process with a clean towel. The final result was even more perfect. The car was washed and polished. The product does what it promises. I used up about 1/3 of the bottle for a large car, so do your calculations if it's worth it for you. Like all Meguiar's products I have, it has a wonderful scent. I highly recommend it, but I suggest following the instructions faithfully and wiping with a very soft towel because coarse dust can scratch your car. I believe it doesn't replace washing with water, but it's great for a quick local refreshment on the car (e.g. on a dirty door) or in cases where you don't want or can't use water