Rather then tell how to search, a quick how to is better. There are duplicate threads all the time...
1. Remove all the stock/wood from the barreled action.
2. Clean off all the cosmoline from the metal. I used paper towels.
3. Use a hair dryer, grill, oven to slowly heat the wood pieces and wipe off the cosmoline as it comes out. It will ooze out when heated.
4. After all the cosmoline is out, heat it a little more because it actually isn't out. Then sand/stain/do whatever you want with the wood.
I sanded and stained then lacquered and it looks great.