Hello, I'm wondering what others have found to be the best way to prep wood before engraving and what you do after it has been engraved? Do you your finish, clear coat, before engraving? If so what do you find to be the best to use? Do you use lacquer, shellac, or I have seen some use a type of bowling alley wax? Or do you do this after it has been engraved? Any of your tips will be greatly appreciated. Thanks