The other posters are correct. Make sure that you use rubbing alcohol to clean. I used(rubbing alcohol) on my emblems on a first project and it turned out great. I've used the Glossifier spray and it's okay. I did it on my fuel door. Since that I used a lot of it, in certain light, angles, it blends in with the truck. I also think it might because the truck is dirty. In this picture you can tell a difference. I also put the glossy on my emblems and I didn't really notice any difference.
Are you taking the wheels off the truck or dipping them mounted to the vehicle?