I have the Induction wheels, not Uberturbine, but the Zink product worked very well. I ordered the kit with the sandpaper and sanding block. You could probably use your own sanding block and go get emery cloth if you wanted, but the kit is easy. There's enough sandpaper to last your lifetime. As you can see from the pictures, on close inspection in the right light you can see it's there, but from normal viewing distance, it is invisible. Note that this was one of the wheels I applied too thickly.
Also, Tony is easily reached for questions and is happy to help. Nice guy.
Here are a couple pro tips I learned from making mistakes:
- hold a finger on the sandpaper side of the block, resting on the wheel where you are not sanding. It will guide the block and prevent you from slipping off the rim onto the flat part of the wheel.
- apply several THIN coats instead of trying to save time and go thicker. The first thin coat will look like it's barely there, but trying to put it on thicker will not be as good of an outcome.
- sand until the surface is smooth, but if there are deep gouges, you don't need to sand them all the way down. Sanding just smooths out the general appearance.