yip, don't pay attention to these guys there is nothing wrong with asking your question.
I have made some nice guns using good cold pressed linseed oil but it took months and months, lead carbonate and a lot of fussing. Not worth it. I have made my own oil varnish from the recipe in the article above with excellent results but again a lot of work and fire danger. I have bought oil varnish from Eric - great stuff, used it all up. Used Tried and True oil varnish with good results. Made my own mix of spar varnish -turpentine - linseed oil with good results but slow to dry. I now use Chambers Stock finish. Expensive, but works and approximates original finishes, doesn't seem to degrade in wet weather, etc. Make your own if you want to do what the 18th century makers did - use the article above for directions. Get a good cold pressed linseed oil from Kremmer if you do and you will need some lead carbonate for dryer for that recipe I believe.