What termite treatment is needed for reclaimed wood being used indoors
This is an interesting question.  I just read the wikipedia article on orange oil.  While this stuff comes out of an orange and is widely thought of as "natural" and "organic" and "safe", it seems like a pretty good description of it might be "turpentine from an orange".

I don't think you are likely to get an accurate and definitive answer to your question.  No matter which way you go, you will be taking a small risk.

If you think about it...all wood came from a tree, and most trees have some bugs in them.  One would think that kiln drying would kill the varmints, but who knows for sure?

If it were me, I would just finish it in the normal way and keep an eye on it after bringing it in the house. Your mileage may vary.