yeah, the Carbon Collective stuff isn't cheap. I added 4 coats to each wheel and had enough to do the brake calipers, and FSWerks exhaust. The amount of spokes makes a difference as I had plenty left over with 5 spokes, but far less when I did my dad's OZ SuperTurismo wheels. The good thing is that the stuff lasts a few years. I might add a new layer this year after giving the wheels a polish this spring. I noticed I either missed some spots or something removed some sections of sealant on the inner rim. With white wheels, I have darker stains that will need some attention. The spokes and outer wheel look perfect, so the stuff does work as long as you got all the areas covered. Typically each year my white wheels are stained and require a lot of work to make them white again. I haven't polished the wheels since adding the sealant. That saves me hours and hours of work every spring, so it is worth it! Plus, I can rinse off the wheels and remove most of the brake dust easily. Another time saving bonus. I still wash them weekly, but if I want to touch them up mid-week, a little water is all that is needed.