From Salopian:

"Here you go boys,
Purdey's London Finishing Oil
For Darkening, Filling & Polishing
All measures are in English (UK)
1/2 pint of Raw Linseed Oil
2 ozs of Plaster of Paris (Dental Quality)
1/2 fluid oz of Butter of antimony
1/2 Gill Spirits of Wine
2 teaspoons of Vinegar
1 teaspoon of Venice Turps.
You can leave out the Antimony if you don't want to darken the wood.
Leave out the Plaster if you don't need to fill the pores.
That's what is in Slacum Oil."

see also: https://www.doublegunshop.com/forums/ubb...e=0&fpart=1

As for climate, England is fairly humid even if it isn't quite the bayou. I suspect drying times have more to do with ingredients and application than the atmosphere. nonetheless, I built a drying cabinet to have a little more control

Jim