Cheers for this one Ed. Got to have a go at this. As you say, on pens is easy to apply and very durable. Will have a go on a small piece  first i think till i get the feel for it.
I love the CA finish but, even tho’ it’s considered food safe, I made some whisky “shots” from olive and elm burr, finished in CA, after several shots the CA has dissolved with the alcohol.
I did not know that CA was considered as food safe, and I have never heard this before.
I would strongly recommend that CA Is Not Used as a Food Safe Finish. The chemicals used to make CA you would not put in your mouth so I don’t see how it can be food safe.
I do not know the facts here and will read up on CA for a factual answer.