I Have Some Barnboard I Want To Use. How Do I Finish It. Do I Sand It First? Then What"? I'm Pretty Much A First Time Novice At This, So Be Specific Please.

The beauty of barnboard is its original appearance and I wouldn't refinish it, unless you want to sand the rough appearance a bit but then you will destroy the patina.

One thing I must suggest though, is before bringing it into your home it should be de-bugged and I think you can get a solution or spray at the hardware store.