Since the neck is finished only with the gunstock oil/wax blend, it is more susceptible to humidity changes. A very infrequent dose of gunstock oil will help to keep the neck maintained; we recommend Birchwood-Casey Tru-Oil, but any good quality gunstock oil will work. Use a small amount, leave it on for just 5 minutes, then wipe it off with a paper towel. After that, apply Birchwood-Casey Gunstock Wax. Be sure to douse the paper towel with water before disposing of it! Read the wax and oil manufacturer's instructions regarding disposal of these used paper towels.
Birchwood-Casey products are available at most sporting goods or gun stores or directly. Their web address is www.birchwoodcasey.com
Rosewood fingerboards should not be treated with the gunstock oil; instead they should be treated with a high grade of lemon oil. Again, for cleaning, try using the same high grade of lemon oil to clean the entire neck, both maple and rosewood fretboards. Ernie Ball Wonder Wipes Fretboard Conditioner are excellent for frequent cleaning and maintenance as they are very effective and string removal is not necessary.
If the neck is very dirty, you can use a small amount of Murphy's Oil Soap, diluted 3:1 to clean it. Keep in mind that if the dirt has gotten into the wood, it cannot be removed except by sanding it down, which we do not recommend. It is better to keep it clean in the first place. Washing your hands first helps! On an unfinished neck, some discoloration after many hours of playing is normal. Be sure to follow all of the manufacturers recommended safety precautions when using any of these oils or waxes.