Hi David, sorry but I've not read all of the posts on this because I'm a bit busy this morning but here is my answer. In case nobody has told you what to use (the proper method) I thought I'd best point you in the rite direction. Frankly, ignore all commercially available oils, they are ok but not up to the job in my opinion. I've been a bespoke furniture and cabinet maker for over 20 years now and whilst I do use the occasional pre made wood oil (for speed on cheap work) I genuinely stick to the old classics which work way better, they take a little time for the finish to build up but its a much deeper and lustrous finish which is easy to top up.
What you need to use for the 1st 3 wipe downs and then periodic cleanings thereafter is an even mixture of Turpentine (you will usually only find Turpentine substitute but this is fine to use), Methylated spirits, and Raw Linseed Oil, it has to be Raw Linseed oil, NOT Boiled Linseed oil. Just wipe the wood down with that and let it dry off a few times before using your main finishing oil which is a 20% Turpentine and 80% raw linseed oil mix. Apply that pretty much whenever you feel like it, let is 'dry' for a few hrs to a few days, in a warmish place and then buff it off well with a clean rag.
The good old chap who apprenticed me, now long, long gone, taught me that the rule of thumb for using raw linseed oil was "once a day for a week, once a week for a month, once a month for a year, and after that; whenever it needs it Boy"
The good thing with it is that its cheap, you can make it up anywhere if your travelling, it doesn't go all sticky and gooey, like many do, if you don't rub it back within an hour of putting it on, and it really penetrates the wood and hardens it off and builds up to a superb finish. It also doesn't stink and freak out everyone in your house and more importantly does not scare the Deer. All the other oils only go 'skin' deep because of the accelerators in them and cost loads of money. The Raw Linseed oil is the king of finishes an always will be, it just takes a little time to build up, seeing as your stock already has some of the lesser stuff on it, it won't take that long to get going though.
Just remember, oily rags can catch on fire spontaneously so dispose of them whenever your finished or lie them out flat in a well ventilated area.
Happy Hunting, Olaf