I just put Gyeon Rim on the front and rear wheels on '21 Harley Street Glide
the wheels were a combination of textured black powder coat and brushed aluminum
the front tire has some nooks and areas that are not easy to get to and the rear is even worse
for what i needed, it was easy....wipe it on and make sure to spread evenly on the surface, let it dwell for a minute or two and use a clean MF to wipe off the excess, it was a lot like applying CanCoat, but not quite as hot, when you buff it out, you get that same slick feeling though....it's a great product and I'll use it again for sealing rims