I got my floats, and I figured out how to remove the post: straighten the end of the wire holding it in with needlenose pliers. They do look like they will be useful. As for sanding and painting, is there a way to do that without special equipment? Sandpaper and spray paint?
I prefer using a Dremel and air brush because they offer more control and a smoother finish, but you can absolutely sand the eyes/floats with a fine sand paper and then paint them with spray paint. Best to use a spray paint that is intended for plastics, but sanding the eyes will make it much easier for the paint to adhere to the plastic.
It's also a good idea to wear a dust mask, because you don't want to be inhaling plastic dust (the dust mask doesn't protect you against fumes from spray paint, for that you need a proper respirator!).