My impression is that finishes free of petroleum products have become somewhat of a niche cottage industry these days. So I wouldn't assume anything acquired f

My impression is that finishes free of petroleum products have become somewhat of a niche cottage industry these days. So I wouldn't assume anything acquired finished by someone else is free of such things, regardless of whatever once-precise names they used to describe the finish. Even when you try DIY-finish something with an eye towards food-safety it's rather challenging. E.g. the "Boiled Linseed Oil" you find on store shelves isn't actually boiled linseed oil, it's usually been adulterated with petroleum distillates and sometimes toxic "dryers" (cobalt comes to mind) to achieve the results boiling used to serve. Here in CA the once common Turpentine which is literally distilled pine trees can't even be sold to the public due to VOCs. The stocked replacements are mostly petroleum distillates, labeled as known to cause cancer in the state. The oil industry has infected everything