Tony, was there a difference between Pilkington's Classic Finish and the rubbing oil you are referencing?
I use a replicated version of his original finish, that I make up myself. According to a distant friend of mine it is the exact same formula that Pilkington's was.
But, the rubbing oil you mention sounds like maybe something different.(?) This is what I am referring to. Is it the same?
https://www.midwayusa.com/product/1006517979?pid=384884
If you'd like to p.m. me I'll be glad to discuss it further with you.