Oh ok.. It still looks nice with the oil finish. YES packing tape and spray finish is a Must.
I bought a Dremel and I use a small sanding disc to sand the insides of my work. It is much easier then hand sanding.
Or you can cut a small strip of sandpaper ( the length of a blade ) and 1/2 in wide. Fold it in half, lengthwise. You put in it in your saw in place of a blade with the fold facing toward you.
It works great for sanding small things or inside of small areas. ( put your speed lower and don't tighten it as much or it will tear the paper)
Just a few hints if you are interested, to help save your finger tips.
Have a blessed day!