Instead of the traditional way of making sanding sticks (wrap. score, wrap, etc.), I used rubber cement. The 3M films last a long time, so the layer upon layer method of making sanding sticks wasn't used. Then, just because I had them, I made more using ice cream, or popsicle sticks. These smaller sticks will allow sanding inside smaller areas.
If you are not familiar with the 3M finishing films and do use sandpaper, you really should look into this material and give it a try. It comes in grits of 9, 15, 30, 40 and 60 microns and the sheets are color coded so you can tell them apart, even though the size is printed on the back side. At one time you could get it in 20 micron, but I haven't seen any of that size. Most jewelry supply houses carry the material, but you can get it from automobile parts stores as the material was originally made for the auto industry.