Irony Curtain: From Matryoshka with Love

While I'm not sure exactly if there's anything else needed, I beat the game twice and the only thing I did differently the second time to get the achievement was one item.

During Chapter 4 you will at the last moments of the game. You will be told you collect a reward from the trophy case. Grab the goblet and go outside. Use it on the cow to obtain milk. Then stir it with the bucket handle wire. You now have butter. Go into the tank and use candle wax in the ammo loading area. Now, use your goblet full of butter on it! I don't know how it has to do with thorough preparations.