Absolutely gorgeous pen Greggy
Hi Matt
The CA BLO finish is the same as french polishing.
You have the lathe running at a slowish speed, have a rubbing cloth ready with a little BLO on it. Then drip a couple of drops of CA onto the revolving pen, and gently move across the work with the oil damp cloth. Once that coat has hardened, not too long. Then add another coat, and so on. If you get some unsightly marks just remove carefully with 1000 wet & dry, or 0000 wire wool. Then continue coating until you have a thickness to your satisfaction.
The benefit of this coating is it's durability, and it can be buffed to a brilliant finish on a wheel.
Some introduce the CA to the work then start the lathe. Could never get on with that myself.