Re: How do you smooth out the back of the neck?
Very lightly sand the neck with 320 grit paper. Once any finish is gone, wipe it with ammonia to raise the grain. Hit it again with the 320 while wet and let it dry. Wipe it again with the ammonia then go over it wet with 600. Repeat the process with 800. Give it a quick dry sand with the 800 and then wipe it with naptha to clean it. When that dries, rub out the neck with tung oil and let it sit for 15 minutes. Wipe up any excess oil with a rag and let the neck dry for 24 his. Rub out the neck with 0000 steel wool, wipe it really fast with naptha to clean up any dust and then apply a second coat of oil. Repeat process above but stop after the steel wool. That should be extremely smooth. It's how I finish all my Jem necks.